Vintage Medical Equipment

For sale here is a vintage American Optical Spencer microscope in fair cosmetic condition. It has components included for transmitted polarized light or petrographic analysis. It is has wear and tear from use evident, including some finish loss on the main barrel. Seems to be all original, though some pieces are missing. As far as I can tell it is missing objectives, a light source or mirror, and slide clips. All controls go through their motions properly. The microscope should be cleaned and lubed internally for optimum performance. Included are what is shown in the photos. Please check out all the photos in this ad for the best idea of cosmetic condition and what is included. Vintage American Optical Spencer POL Polarized or Petrographic Microscope. It has wear and tear from use evident, including some finish loss on the main barrel, and ID marks inscribed on the front of the main barrel as well. As far as I can tell this microscope is missing objectives, a light source or mirror, and slide clips. Also, the objective holder on the microscope barrel is a bayonet-type mount so you will need to supply the half of the mount that fixes to the objective. It does have the rotating polarizing condenser filter, analyzer slide, and polarizing barrel. Also it includes the rotating graduated stage, an 8x eyepiece with cross hairs, and its original wooden storge box. The box has a handle with only one end attached and does not have a key. All microscope controls go through their motions properly. This scope has been in storage for a long time and should be cleaned and lubed internally for optimum performance. No other parts or accessories are included or available in this listing. The item you will receive is the one in the photos. Guaranteed to be as described. The sale of this item may be subject to regulation by the U. Food and Drug Administration and state and local regulatory agencies. Please do not expect to get anything with the item being auctioned that is not shown in the pictures unless it is mentioned in the item description as included with the item. I do my best to check our items and list my findings in the item’s description, but I won’t take responsibility for anything I did not mention out of lack of knowledge of the item. I guarantee everything I say the item is, but I may not know enough about the item to mention everything it is not. We do allow local pickups. In order to provide a quote, we need a postal code or zip code, city and country. Please do not expect to get anything with the item being auctioned that is not shown in the pictures, unless it is mentioned in the item description as being included. I do my best to check our items and list my findings in the item description, but I won’t take responsibility for anything I didn’t mention out of lack of knowledge of the item. I guarantee everything I say the item is, but I may not know enough about the item to mention everything it isn’t. We try to treat all our buyers as we ourselves would want to be treated. If you are not happy we are not happy. Auctiva offers Free Image Hosting and Editing. Auctiva gets you noticed! Track Page Views With. Auctiva’s FREE Counter. The item “Vintage American Optical Spencer POL Polarized or Petrographic Microscope” is in sale since Wednesday, April 3, 2019. This item is in the category “Business & Industrial\Healthcare, Lab & Dental\Medical & Lab Equipment, Devices\Microscopes”. The seller is “tpap8″ and is located in Norman, Oklahoma. This item can be shipped worldwide.

• Model: Unknown
• Microscope Type: Compound Microscope
• Country/Region of Manufacture: United States
• Microscope Structure: Upright
• MPN: Spencer
• Viewer: Monocular
• Brand: American Optical

BAUSCH & LOMB VINTAGE LI-2 DYNOPTIC PETROGRAPHIC POLARIZING LAB MICROSCOPE, 1967. BAUSCH & LOMB VINTAGE MODEL LI-2 DYNOPTIC PETROGRAPHIC POLARIZING LABORATORY MICROSCOPE – 1967. Accompanying the instrument is a set of three (3) objective lenses and a pair of B&L crosshair eyepieces. This is a fully functional intermediate series research grade laboratory microscope that is still fully capable of both qualitative and quantitative petrographic analyses of minerals and crystals. The instrument also bears a serial number, which is found on the underside of the limb, 8697 VD (See image). This serial number dates this instrument to the year 1967. As is mentioned in the 2003 publication entitled, The Petrographic Microscope: Evolution of a Mineralogical Research Instrument by Daniel E. Kile, petrographic microscopes and accessories are comparatively rare. For every 100 biological microscopes manufactured, perhaps only one was made for petrographic use. In addition, petrographic microscopes are much more complicated than biological microscopes. Although the magnifying powers used are comparable and not so great, there are attached appliances for special examination of mineral or chemical substances that require very careful adjustment. This vintage Bausch & Lomb specialty microscope is equipped with such special features such as a rotating circular stage with peripheral vernier scale, an x-y mechanical stage, a flip-in/flip-out Bertrand Lens, a flip-in/flip-out Polaroid analyzer, a rotating substage condenser-Polaroid polarizer, a set of two (2) focusing cross hair eyepieces, a quick-change nosepiece with a pair of special adaptors for a compliment of three (3) strain-free objective lenses, and a port above the objective holder to accommodate special optional accessories (compensators / sliders) needed for the microscopic analysis of minerals. Accompanying this listing from my personal collection of antique and vintage microscope catalogues is a cut from the 1970 edition of B&Ls Catalogue of Polarizing Microscopes that shows this model microscope. It is included here for comparison with the featured instrument. The similarities to the featured instrument are readily apparent. Petrographic polarizing microscopes first made their appearance in Europe and the UK in the latter decades of the 19th Century. Such prominent microscope manufacturers as Nachet, Verick, Fuess, Lietz, Leiss, Zeiss, Reichert, Siebert, Watson, Swift & Son and others all produced their own versions of this specialty instrument. American microscope manufacturers soon followed suit. In the late 1890s Bausch & Lomb entered into a special cooperative business relationship with Zeiss in Germany, which allowed them to acquire some of the special technical expertise needed to produce a new line of petrographic polarizing microscopes in the USA. In addition, B&L used the design of Dr. Wright from the Carnegie Institution of Washington, D. To produce their own unique line of petrological polarizing microscopes. The end result was the introduction of the L series of Petrographic Polarizing Microscopes. This line initially included the LCH (Laboratory Model) and the LD (Research Model) with the familiar Jug-handle limb that was popular during the early decades of the 20th Century. By the early 1960s, the designs had become more refined and the line was renamed the Dynoptic Polarizing Microscope series, which involved the use of Polaroid analyzers and polarizers instead of crystal prisms. Relative to the word, Dynoptic, B&L stated in their literature: The word DYNOPTIC has been chosen to be indicative of the mechanical and optical excellence with which this series of microscopes has been endowed. Offered here is an early example of a Model LI-2 Dynoptic Petrographic Polarizing Microscope from the mid-20th Century. For the vintage / antique microscope collector this B&L Model LI-2 Dynoptic Petrographic Polarizing Microscope represents one of several significant advances in the evolution and design of this specialty microscope offered by the US based Bausch & Lomb Optical Company. As such, it will be a most welcome and valuable addition to any vintage / antique microscope collection, especially one with an emphasis on petrographic polarizing microscopes. As an added bonus, it still is 100% fully functional, and, it can still be used in a modern petrographic laboratory to conduct both qualitative and quantitative analyses of mineral samples. Dont miss this opportunity to make this sophisticated scientific instrument your own. This microscope is built upon B&Ls modern Dynoptic stand that consists of a heavy elongated horseshoe-shaped base with an integral short split pillar that rises from the base and terminates in a trunnion joint. This joint supports the rest of the microscope, including the widely sweeping -continental style arm, the stage, the body tube and the substage assembly. The trunnion joint allows the microscope to be tilted at any angle from the vertical to allow for the comfortable viewing of specimen slides atop the stage. Coarse focus is by angled rack and pinion. Fine adjustment is by a pair of micrometer knobs found on either side of the trunnion joint. The knob on the right side has a vernier scale with the inscribed notation that 1 division is equal to 0.001mm in the fine focus of the instrument a very precise level of fine focus on any microscope. The microscope is equipped with a centerable 130 mm diameter ball-bearing circular rotating stage with an engraved vernier scale on the periphery. The stage circumference is graduated in single degrees with each tenth line numbered. An arrest mechanism is provided at the left side of the stage to lock the stage in place, if desired. This particular instrument is equipped with an x-y mechanical stage with its own vernier scale. It includes an adjustable slide holder, which can accommodate a full range of slide sizes from the smallest to the larger types often used for prepared mineral thin sections. Below the stage is a relatively complex substage apparatus consisting of a condenser/ polarizer assembly with an integral iris diaphragm, heat-adsorbing filter, Polaroid polarizer and two condensing lenses. The condenser has a variable focus feature from 0.08 N. To 1.25 N. Without the inconvenience of removing or swinging-out the upper lens element. The polarizer is rotatable through 360 degrees and is graduated at each 45 degrees. Under the substage condenser / polarizer unit is a 54mm diameter plano-concave mirror on a removable double prong mirror support that completes the substage illumination system. The body tube of this microscope is much more complex than that found on a conventional biological microscope. At the top of the body tube is an ocular holder with a slot in its upper edge. This feature is designed for fixing the azimuth of cross hair eyepieces used on the instrument. Two (2) B&L Huygenian focusing cross hair keyed eyepieces are provided with the instrument: A 7.5x and a 10x. About a third of the way down the body tube below the eyepiece holder is a flip-in/flip-out fixed focus Bertrand lens that is used with the 45x objective for the examination of interference figures of mineral specimens. A hand knob on the right side of the instrument controls its position either into or out of the optical path. It is also sealed in place to prevent dust entry into the body tube. At the approximate lower third of the body tube is a flip-in/flip-out Polaroid analyzer. It too is controlled by a hand knob found on the right side of the body tube allowing it to be moved into or out of the optical path with a quick flip of the wrist. Below the analyzer is a port that is used to accommodate optional polarizing sliders/compensators. Note: In this case, no compensators are included with this instrument. Under the slider port is a special fitting with a locking mechanism for the objective lenses. Three (3) strain-free objective lenses (all by B&L) are provided with the instrument: A 10x 16mm 0.25 N. A 21x 8mm 0.50 NAand a 45x 4mm 0.85 N. Included with the objectives is a pair of special adaptors with centering pins, which are used to center the objectives. This microscope stands about 13.5 inches tall and weighs about 12 pounds a relatively heavy vintage microscope. There is no wood case or any other accessories included with this microscope. NOTE: The accompanying images are a part of this statement of condition. Please take the time to view all of the images so you can confirm the condition of the instrument and so you will know exactly what you will be getting should you prove to be the proud new owner of this vintage B&L Model LI-2 Dynoptic Petrographic Polarizing microscope. In summary, this microscope is in very good to excellent condition cosmetically, mechanically and optically. As the accompanying images attest, the black lacquered metal and chromed parts of this instrument are in very good to excellent condition. There are just a few very minor rub marks on the side and back of the limb, under the stage, and on the rear of the mechanical stage. The optics associated with this microscope are in excellent condition. Both the eyepieces and the objective lenses that come with the instrument are free of any optical defects. However, the 10x eyepiece is missing one of the cross hairs. The Bertrand lens and the Polariod analyzer are without any internal optical defects. The substage condenser with its iris diaphragm is in good condition. The substage polarizer is in good condition with no optical defects. The analyzer and polarizer act in concert to provide polarized light for the observation of minerals and crystals. The views under polarized light are quite pleasing, as the accompanying composite images of a thin section of the mineral Pyroxenite from the Canary Islands of Spain will testify. These images were captured using the 10x objective mounted on this very microscope. Images show the mineral under crossed polars. Note the resolution of some of the finer details of the mineral specimen evident in these images. The plano-concave mirror is in good condition with no major defects on either side. Mechanically, both the coarse and fine focus mechanisms work smoothly and flawlessly on this instrument. The stage rotates smoothly and the arrest mechanism for the stage works properly. The substage apparatus works perfectly and it provides excellent illumination to the stage. The left coarse focus knob has a very slight warp, but this does not in any way affect the proper adjustment of the coarse focus. The sliding cover for the compensator port is missing its lever and so the port currently remains in the open position. However, if desired, it can be closed easily using a forceps or blunt needle. Overall, this is a very nicely preserved example of a vintage Bausch & Lomb Model LI-2 Dynoptic Petrographic Polarizing Microscope from the mid-20th Century. It is certainly worthy of any vintage / antique microscope collection. And, should one choose to do so, it can still be used to this day for the serious qualitative examination and detailed quantitative analysis of mineral and other suitable specimens under polarized light. We will also entertain reasonable offers for this fully functional vintage precision instrument. FREE scheduling, supersized images and templates. Get Vendio Sales Manager. Make your listings stand out with FREE Vendio custom templates! Over 100,000,000 served. Get FREE counters from Vendio today! The item “BAUSCH & LOMB VINTAGE LI-2 DYNOPTIC PETROGRAPHIC POLARIZING LAB MICROSCOPE, 1967″ is in sale since Tuesday, November 20, 2018. This item is in the category “Business & Industrial\Healthcare, Lab & Dental\Medical & Lab Equipment, Devices\Microscopes”. The seller is “mtloggera” and is located in Hamilton, Montana. This item can be shipped worldwide.

• Viewer: Monocular
• Microscope Structure: Upright
• Brand: Bausch and Lomb
• Microscope Type: Polarizing Microscope
• Country/Region of Manufacture: United States
• Intended Use/Discipline: Geological/minerological Laboratory
• Model: LI-2 Petrographic Polarizing Microscope

BAUSCH & LOMB VINTAGE LI-2 DYNOPTIC PETROGRAPHIC POLARIZING LAB MICROSCOPE, 1967. BAUSCH & LOMB VINTAGE MODEL LI-2 DYNOPTIC PETROGRAPHIC POLARIZING LABORATORY MICROSCOPE – 1967. Accompanying the instrument is a set of three (3) objective lenses and a pair of B&L crosshair eyepieces. This is a fully functional intermediate series research grade laboratory microscope that is still fully capable of both qualitative and quantitative petrographic analyses of minerals and crystals. The instrument also bears a serial number, which is found on the underside of the limb, 8697 VD (See image). This serial number dates this instrument to the year 1967. As is mentioned in the 2003 publication entitled, The Petrographic Microscope: Evolution of a Mineralogical Research Instrument by Daniel E. Kile, petrographic microscopes and accessories are comparatively rare. For every 100 biological microscopes manufactured, perhaps only one was made for petrographic use. In addition, petrographic microscopes are much more complicated than biological microscopes. Although the magnifying powers used are comparable and not so great, there are attached appliances for special examination of mineral or chemical substances that require very careful adjustment. This vintage Bausch & Lomb specialty microscope is equipped with such special features such as a rotating circular stage with peripheral vernier scale, an x-y mechanical stage, a flip-in/flip-out Bertrand Lens, a flip-in/flip-out Polaroid analyzer, a rotating substage condenser-Polaroid polarizer, a set of two (2) focusing cross hair eyepieces, a quick-change nosepiece with a pair of special adaptors for a compliment of three (3) strain-free objective lenses, and a port above the objective holder to accommodate special optional accessories (compensators / sliders) needed for the microscopic analysis of minerals. Accompanying this listing from my personal collection of antique and vintage microscope catalogues is a cut from the 1970 edition of B&Ls Catalogue of Polarizing Microscopes that shows this model microscope. It is included here for comparison with the featured instrument. The similarities to the featured instrument are readily apparent. Petrographic polarizing microscopes first made their appearance in Europe and the UK in the latter decades of the 19th Century. Such prominent microscope manufacturers as Nachet, Verick, Fuess, Lietz, Leiss, Zeiss, Reichert, Siebert, Watson, Swift & Son and others all produced their own versions of this specialty instrument. American microscope manufacturers soon followed suit. In the late 1890s Bausch & Lomb entered into a special cooperative business relationship with Zeiss in Germany, which allowed them to acquire some of the special technical expertise needed to produce a new line of petrographic polarizing microscopes in the USA. In addition, B&L used the design of Dr. Wright from the Carnegie Institution of Washington, D. To produce their own unique line of petrological polarizing microscopes. The end result was the introduction of the L series of Petrographic Polarizing Microscopes. This line initially included the LCH (Laboratory Model) and the LD (Research Model) with the familiar Jug-handle limb that was popular during the early decades of the 20th Century. By the early 1960s, the designs had become more refined and the line was renamed the Dynoptic Polarizing Microscope series, which involved the use of Polaroid analyzers and polarizers instead of crystal prisms. Relative to the word, Dynoptic, B&L stated in their literature: The word DYNOPTIC has been chosen to be indicative of the mechanical and optical excellence with which this series of microscopes has been endowed. Offered here is an early example of a Model LI-2 Dynoptic Petrographic Polarizing Microscope from the mid-20th Century. For the vintage / antique microscope collector this B&L Model LI-2 Dynoptic Petrographic Polarizing Microscope represents one of several significant advances in the evolution and design of this specialty microscope offered by the US based Bausch & Lomb Optical Company. As such, it will be a most welcome and valuable addition to any vintage / antique microscope collection, especially one with an emphasis on petrographic polarizing microscopes. As an added bonus, it still is 100% fully functional, and, it can still be used in a modern petrographic laboratory to conduct both qualitative and quantitative analyses of mineral samples. Dont miss this opportunity to make this sophisticated scientific instrument your own. This microscope is built upon B&Ls modern Dynoptic stand that consists of a heavy elongated horseshoe-shaped base with an integral short split pillar that rises from the base and terminates in a trunnion joint. This joint supports the rest of the microscope, including the widely sweeping -continental style arm, the stage, the body tube and the substage assembly. The trunnion joint allows the microscope to be tilted at any angle from the vertical to allow for the comfortable viewing of specimen slides atop the stage. Coarse focus is by angled rack and pinion. Fine adjustment is by a pair of micrometer knobs found on either side of the trunnion joint. The knob on the right side has a vernier scale with the inscribed notation that 1 division is equal to 0.001mm in the fine focus of the instrument a very precise level of fine focus on any microscope. The microscope is equipped with a centerable 130 mm diameter ball-bearing circular rotating stage with an engraved vernier scale on the periphery. The stage circumference is graduated in single degrees with each tenth line numbered. An arrest mechanism is provided at the left side of the stage to lock the stage in place, if desired. This particular instrument is equipped with an x-y mechanical stage with its own vernier scale. It includes an adjustable slide holder, which can accommodate a full range of slide sizes from the smallest to the larger types often used for prepared mineral thin sections. Below the stage is a relatively complex substage apparatus consisting of a condenser/ polarizer assembly with an integral iris diaphragm, heat-adsorbing filter, Polaroid polarizer and two condensing lenses. The condenser has a variable focus feature from 0.08 N. To 1.25 N. Without the inconvenience of removing or swinging-out the upper lens element. The polarizer is rotatable through 360 degrees and is graduated at each 45 degrees. Under the substage condenser / polarizer unit is a 54mm diameter plano-concave mirror on a removable double prong mirror support that completes the substage illumination system. The body tube of this microscope is much more complex than that found on a conventional biological microscope. At the top of the body tube is an ocular holder with a slot in its upper edge. This feature is designed for fixing the azimuth of cross hair eyepieces used on the instrument. Two (2) B&L Huygenian focusing cross hair keyed eyepieces are provided with the instrument: A 7.5x and a 10x. About a third of the way down the body tube below the eyepiece holder is a flip-in/flip-out fixed focus Bertrand lens that is used with the 45x objective for the examination of interference figures of mineral specimens. A hand knob on the right side of the instrument controls its position either into or out of the optical path. It is also sealed in place to prevent dust entry into the body tube. At the approximate lower third of the body tube is a flip-in/flip-out Polaroid analyzer. It too is controlled by a hand knob found on the right side of the body tube allowing it to be moved into or out of the optical path with a quick flip of the wrist. Below the analyzer is a port that is used to accommodate optional polarizing sliders/compensators. Note: In this case, no compensators are included with this instrument. Under the slider port is a special fitting with a locking mechanism for the objective lenses. Three (3) strain-free objective lenses (all by B&L) are provided with the instrument: A 10x 16mm 0.25 N. A 21x 8mm 0.50 NAand a 45x 4mm 0.85 N. Included with the objectives is a pair of special adaptors with centering pins, which are used to center the objectives. This microscope stands about 13.5 inches tall and weighs about 12 pounds a relatively heavy vintage microscope. There is no wood case or any other accessories included with this microscope. NOTE: The accompanying images are a part of this statement of condition. Please take the time to view all of the images so you can confirm the condition of the instrument and so you will know exactly what you will be getting should you prove to be the proud new owner of this vintage B&L Model LI-2 Dynoptic Petrographic Polarizing microscope. In summary, this microscope is in very good to excellent condition cosmetically, mechanically and optically. As the accompanying images attest, the black lacquered metal and chromed parts of this instrument are in very good to excellent condition. There are just a few very minor rub marks on the side and back of the limb, under the stage, and on the rear of the mechanical stage. The optics associated with this microscope are in excellent condition. Both the eyepieces and the objective lenses that come with the instrument are free of any optical defects. However, the 10x eyepiece is missing one of the cross hairs. The Bertrand lens and the Polariod analyzer are without any internal optical defects. The substage condenser with its iris diaphragm is in good condition. The substage polarizer is in good condition with no optical defects. The analyzer and polarizer act in concert to provide polarized light for the observation of minerals and crystals. The views under polarized light are quite pleasing, as the accompanying composite images of a thin section of the mineral Pyroxenite from the Canary Islands of Spain will testify. These images were captured using the 10x objective mounted on this very microscope. Images show the mineral under crossed polars. Note the resolution of some of the finer details of the mineral specimen evident in these images. The plano-concave mirror is in good condition with no major defects on either side. Mechanically, both the coarse and fine focus mechanisms work smoothly and flawlessly on this instrument. The stage rotates smoothly and the arrest mechanism for the stage works properly. The substage apparatus works perfectly and it provides excellent illumination to the stage. The left coarse focus knob has a very slight warp, but this does not in any way affect the proper adjustment of the coarse focus. The sliding cover for the compensator port is missing its lever and so the port currently remains in the open position. However, if desired, it can be closed easily using a forceps or blunt needle. Overall, this is a very nicely preserved example of a vintage Bausch & Lomb Model LI-2 Dynoptic Petrographic Polarizing Microscope from the mid-20th Century. It is certainly worthy of any vintage / antique microscope collection. And, should one choose to do so, it can still be used to this day for the serious qualitative examination and detailed quantitative analysis of mineral and other suitable specimens under polarized light. We will also entertain reasonable offers for this fully functional vintage precision instrument. FREE scheduling, supersized images and templates. Get Vendio Sales Manager. Make your listings stand out with FREE Vendio custom templates! Over 100,000,000 served. Get FREE counters from Vendio today! The item “BAUSCH & LOMB VINTAGE LI-2 DYNOPTIC PETROGRAPHIC POLARIZING LAB MICROSCOPE, 1967″ is in sale since Saturday, November 10, 2018. This item is in the category “Business & Industrial\Healthcare, Lab & Dental\Medical & Lab Equipment, Devices\Microscopes”. The seller is “mtloggera” and is located in Hamilton, Montana. This item can be shipped worldwide.

• Viewer: Monocular
• Microscope Structure: Upright
• Brand: Bausch and Lomb
• Microscope Type: Polarizing Microscope
• Country/Region of Manufacture: United States
• Intended Use/Discipline: Geological/minerological Laboratory
• Model: LI-2 Petrographic Polarizing Microscope

BAUSCH & LOMB VINTAGE “LI-2″ PETROGRAPHIC POLARIZING MICROSCOPE STAND FOR PARTS. BAUSCH & LOMB VINTAGE MODEL LI-2 PETROGRAPHIC POLARIZING MICROSCOPE STAND 1967 – FOR PARTS OR REPAIR. This instrument is one of B&L’s Dynoptic Polarizing Microscope models that used Sextant grade Polaroid discs in the analyzer and substage polarizer in lieu of crystalline prisms. This listing is for the stand only – no eyepieces or objectives are included with the microscope stand. It is offered for parts or for repair. Also, this instrument bears the serial number, 8722VD found under the base of the limb (see images). This serial number dates the microscope to the year 1967. This instrument is being offered for parts or repair due mainly to the fact that the Polaroid discs in this instrument have evidently delaminated. As a result, it is not possible to use the instrument for petrographic-polarization investigations. In addition, there is a chip in the top of the condenser lens, which adversely affects the performance of the illumination system. The Barlow lens appears to be present in the body tube, but we were unable to test its function. On the positive side, this instrument is still fully functional mechanically with the coarse and fine focus mechanisms working smoothly. The cosmetic condition is very good as well. It is possible to restore this instrument to full functionality by replacing the Polaroid discs in the body tube and substage condenser/polarizer assembly. A replacement for the condenser lens will also be needed. And, I should mention that it is still possible to use this microscope as a standard biological microscope even with the defects noted. FREE scheduling, supersized images and templates. Get Vendio Sales Manager. Make your listings stand out with FREE Vendio custom templates! Over 100,000,000 served. Get FREE counters from Vendio today! The item “BAUSCH & LOMB VINTAGE LI-2 PETROGRAPHIC POLARIZING MICROSCOPE STAND FOR PARTS” is in sale since Wednesday, October 3, 2018. This item is in the category “Business & Industrial\Healthcare, Lab & Dental\Medical & Lab Equipment, Devices\Microscopes”. The seller is “mtloggera” and is located in Hamilton, Montana. This item can be shipped worldwide.

• Brand: Bausch + Lomb
• Microscope Type: Polarizing Microscope
• Country/Region of Manufacture: United States
• Intended Use/Discipline: Geology
• Model: LI-2 Petrographic Polarizing Microscope

LOMO Microscope Polarizing Petrographic MP-2 Vintage Mechanics works ok. Condenser prism has some fungus – see pictures. The item “LOMO Microscope Polarizing Petrographic MP-2 Vintage” is in sale since Wednesday, May 23, 2018. This item is in the category “Business & Industrial\Healthcare, Lab & Life Science\Lab Equipment\Microscope Parts & Accessories”. The seller is “mucinetto” and is located in Europe. This item can be shipped worldwide.

BAUSCH & LOMB VINTAGE “LC” PETROGRAPHIC POLARIZING RESEARCH MICROSCOPE – 1954. SUPERB BAUSCH & LOMB VINTAGE RESEARCH MODEL LC PETROGRAPHIC POLARIZING MICROSCOPE 1954. This model instrument was second only in size and complexity to their top of the line Model LD Research Petrographic Polarizing Microscope. It is a very large, impressive, and superbly engineered instrument that is still fully functional to this day. Also, this instrument bears the serial number, RD4988. This serial number dates the microscope to the year 1954. In addition, three (3) US Patent numbers are found on a plaque at the top of the limb (see image). 2,093,611, 2,101935, and 2,117,161. The first Patent number refers to a patent granted to H. Kurtz dated September 21, 1937 and assigned to the Bausch & Lomb Optical Co. For the fine focus mechanism used on this instrument. The second patent number refers to a patent granted to G. B Gallasch dated December 14, 1937 and assigned to B&L for the body tube attachment mechanism used on this microscope. The last patent number refers to a patent granted to G. Kurtz dated May 10, 1938 and assigned to B&L for the body tube slide mechanism used on this model microscope. NOTE: We will provide complete copies of each of these US Patents along with the microscope. As is mentioned in the 2003 publication entitled, The Petrographic Microscope: Evolution of a Mineralogical Research Instrument by Daniel E. Kile, petrographic microscopes and accessories are comparatively rare. So, for every 100 biological microscopes manufactured, perhaps only one was made for petrographic use. In addition, petrographic microscopes are much more complicated than biological microscopes. Although the magnifying powers used are comparable and not so great, there are attached appliances for special examination of mineral or chemical substances that require very careful adjustment. This vintage Bausch & Lomb specialty microscope is equipped with such special features as a rotating circular stage with vernier scale, an adjustable prism analyzer system, an adjustable and focusable Bertrand Lens with iris diaphragm, a rotating substage prism polarizer with Abbe condenser on a sliding dovetail bar, a focusing crosshair eyepiece, an objective lens in a centering adaptor and a port above the objective holder to accommodate special optional accessories (sliders or compensators) needed for the microscopic analysis of minerals. Petrographic polarizing microscopes first made their appearance in Europe and the UK in the latter decades of the 19th Century. Such prominent microscope manufacturers as Nachet, Fuess, Lietz, Leiss, Zeiss, Reichert, Siebert, Watson, Swift & Son and others all produced their own versions of this specialty instrument. American microscope makers especially B&L and Spencer were soon to follow suit with their own versions of this specialty microscope. In the late 1890s Bausch & Lomb entered into a special cooperative business relationship with Zeiss in Germany, which allowed them to acquire some of the special technical expertise needed to produce a new line of petrographic polarizing microscopes in the USA. In addition, B&L used the design of Dr. Wright from the Carnegie Institution of Washington, D. To produce their own unique line of petrological polarizing microscopes. The end result was the introduction of the L series of Petrographic Polarizing Microscopes. This line ultimately included the Chemical model M with an eye-cap analyzer, the LA with a body tube analyzer, the LB and LC with a built-in rotating analyzer and the very sophisticated LD with a device for the simultaneous rotation of both the analyzer and polarizer. The LA and LB were considered basic models, while the LC and LD were designed more for research. By the mid-1960s, the designs were changed, doing away with the use of polarizing prisms with the substitution of Polaroid films for the analyzer and polarizer. The line was renamed the LM Dynoptic Polarizing Microscope series. Offered here is a nice example of a Model LC Research Petrographic Polarizing Microscope from the early 1950s. Accompanying this listing is a catalogue cut of the B&L Model LC extracted from my personal copy of the Bausch & Lomb Scientific Instruments Catalog D-111 published in 1940. B&L described the LC model as follows: The LC Polarizing Microscope has been designed to offer an instrument provided with the optics and precision required for research work in general, yet sturdy enough for years of routine work in teaching or industry. The similarities to the listed instrument are readily apparent. For the vintage / antique microscope collector this B&L Research Model LC Petrographic Polarizing Microscope represents one of several significant advances in the evolution and design of this specialty microscope offered by the US based Bausch & Lomb Optical Company. As such, it will be a most welcome and valuable addition to any vintage / antique microscope collection, especially one with an emphasis on petrographic polarizing microscopes. This microscope is built upon a nicely sculpted long linear and heavy V-shaped base with an integral short trapezoid shaped plate-pillar that that terminates in a compass joint. This joint supports the rest of the microscope, including a gently sweeping semicircular arm. The curved arm provides an abundance of working space at the stage and adequately accommodates an optional Federoff Universal Stage. The top of the limb supports the body tube with the focusing mechanisms. The lower end of the limb supports the circular rotating stage and a complex substage assembly with illuminating apparatus. The compass joint allows the microscope to be tilted at any angle from the vertical to allow for the comfortable viewing of specimen slides mounted atop the stage. Coarse focus is by rack and pinion controlled by means of a pair of milled heads found at the top of the limb. Fine adjustment is by a pair of micrometer knobs that are mounted near the top of the limb, but below and behind the coarse focus knobs. The right fine focus control knob is inscribed with a vernier scale that allows the observer to note and to return to a specific fine focus position, if desired. Each increment of fine focus represents 0.002mm (2 micons) of motion. This greatly simplifies measurements of depth and thickness of observed specimens. The microscope is equipped with a large 125mm diameter ball-bearing circular rotating stage with an engraved vernier scale on the periphery. The stage circumference is graduated in single degrees with each tenth line numbered. A single control knob on the right rear of the stage is provided to arrest the stage rotation in a specific position, if desired. The top of the stage has provisions for mounting slide clips, a mechanical stage or even a large Federoff Universal Stage. This instrument is equipped with a single slide clip. Below the stage is a relatively complex Abbe condenser system along with a prism polarizer mounted on a brass bar that can be raised or lowered towards or away from the stage by means of a rack & pinion system controlled by a control knob found on the left side of the microscope. On top of this array is a dovetail mounted condenser system consisting of a 0.10 N. Flip-out top lens of the condenser that is controlled by a lever that extends from the right side of the assembly (Note: This lens is missing from this instrument). Under the flip-out condenser lens is a lever that controls an optical mask or shadow plate that allows the observer to completely close off the light from the illumination system for use when observing large opaque specimens or to facilitate Becke line tests for index measurements. Under this is an iris diaphragm that is controlled by a lever found on the front side of the instrument. This leaves a 0.28 N. Condenser, which is used to illuminate the larger field of view required when working with 16mm and larger mm objective lenses. The dovetail slider can be completely removed from the instrument, if desired, by sliding it laterally off of the instrument. Beneath the condenser diaphragm is a cylindrical polarizer containing a Glan Thompson prism in a revolving mount with a graduated scale engraved around its circumference. The lower end of the polarizer is equipped with its own iris diaphragm that is controlled by a peripheral knurled ring. Under this assembly is a 50mm plano-concave mirror on a moveable mirror bar that completes the substage illumination system. The mirror bar can be moved to the right or left to provide oblique illumination, if desired. This instrument is equipped with a large diameter (39mm) body tube that is quite complex with a lot of special features. At the top of the body tube is a nickel-plated brass ocular holder with two slots in its upper edge set a few degrees apart. This feature is designed for fixing the azimuth of a cross hair eyepiece. Included with the microscope is a single 30mm diameter 10x focusing Huygenian ocular with internal cross hair. This ocular has a set pin mounted on the side of the barrel. This pin permits the ocular to fit into either one of the slots in the ocular holder. Gently twisting and moving the internal lens barrel up or down focuses the cross hair of the eyepiece. Below the ocular holder is a Bertrand lens mounted on a slider so it can be moved either in or out of the optical path. Two (2) adjustment points are found at the end of the slider that allows the Bertrand lens to be precisely centered in the optical path. The Bertrand lens is also equipped with an iris diaphragm and the slider port is equipped with a dust shield. In addition, the lens is focused by moving the entire box slider containing the lens either up or down within the body tube. Near the bottom of the body tube is an analyzer box slider that slides in or out of the optical path within the body tube. The analyzer is an Ahrens prism, which can be rotated 90 degrees. The prism is set in a sliding prism box that is engraved with graduations and an indicator that enables withdrawal and return to the optical axis without disturbing the reading on the scale. Graduations are in 5-degree partitions, with every tenth line numbered at 0, 45 and 90 degrees. The analyzer port is also equipped with a dust shield. At the lower end of the body tube is a special Quick Change holder that accepts individual objectives equipped with special centering mounts. The exact position of each objective in the optical path can be finely adjusted horizontally with a pair of adjustment points found on either side of the objective mount. A single Spencer 16mm objective with mount is included with this instrument. Immediately above the objective holder is a slot for polarizing accessories (compensators). However, no compensators are included with this microscope. When set up or observations, this instrument stands about 15 inches tall and it weighs 17 pounds making for a relatively heavy vintage POL microscope. There is no wood case or any other accessories that accompany this instrument. NOTE: The accompanying images, which were captured under ambient light conditions, are a part of this statement of condition. Please take the time to view all of the images so you can confirm the condition of the instrument and so you will know exactly what you will be getting should you prove to be the proud new owner of this very fine B&L Research Model LC Petrographic Polarizing microscope. In summary, this microscope is in very good condition cosmetically, mechanically and optically, but with a few relatively minor caveats as follows. As the accompanying images attest, the black lacquered metal and nickel-plated brass parts on this instrument are in very good condition and are for the most part free of any significant noticeable imperfections. However, quite typically, the black lacquered metal parts have some scratches, rub marks, dings and minor chips in the lacquer from use over time. The optics associated with this microscope are of very high quality. Both the eyepiece and the objective lens are free of any optical defects and are cosmetically in very nice condition. The delicate cross hair in the eyepiece is present. The prisms in both the analyzer and the polarizer are in excellent condition with no evidence of any prism disease (see close-up images of both prisms). The Bertrand lens is in excellent condition. As was noted above, the 1.10 NA flip-out/flip-in top lens in the condenser is missing from the instrument, but the lower 0.28 NA condenser is present and is in excellent condition. It very nicely matches the 16mm objective lens included with the microscope. Both sides of the plano-concave mirror are in very good condition. This instrument produces sharp, high contrast polarized images. In fact, this microscope can still be used for serious petrographical investigations to this day. In proof thereof, accompanying this listing is a composite image of a thin section of the mineral Pryroxenite captured under polarized light using this very instrument. Fine details in the mineral specimen are very nicely resolved. Mechanically, both the coarse and fine focus mechanisms work smoothly and flawlessly on this instrument. The stage rotates freely and the arrest mechanism works as it should. The substage rack and pinion system works smoothly. The iris diaphragms in the substage illumination system work flawlessly and the diaphragm blades are free of any tarnish or rust. Overall, this is a very nicely preserved example of a vintage Bausch & Lomb Model LC Research Petrographic Polarizing Microscope. It is most certainly worthy of any antique/vintage microscope collection. And, should one choose to do so, it can still be used to this day for the serious examination and analysis of minerals under polarized light. We will also entertain reasonable offers for this magnificent instrument. FREE scheduling, supersized images and templates. Get Vendio Sales Manager. Make your listings stand out with FREE Vendio custom templates! Over 100,000,000 served. Get FREE counters from Vendio today! The item “BAUSCH & LOMB VINTAGE LC PETROGRAPHIC POLARIZING RESEARCH MICROSCOPE 1954″ is in sale since Monday, June 25, 2018. This item is in the category “Business & Industrial\Healthcare, Lab & Life Science\Lab Equipment\Microscopes”. The seller is “mtloggera” and is located in Hamilton, Montana. This item can be shipped worldwide.

• Optical/Digital: Optical
• Model: Model LC Petrographic Polarizing Research Microscope
• Country/Region of Manufacture: United States
• Optical Microscope Type: Compound Microscope
• Brand: Bausch + Lomb

Good working condition Analyzer is good Bertrand lens is good Mechanics is ok Comes from MP series polarizing microscope. The item “LOMO Polarizing Microscope Vintage Tube Petrographic w Eyepiece Objective” is in sale since Friday, May 12, 2017. This item is in the category “Business & Industrial\Healthcare, Lab & Life Science\Lab Equipment\Microscope Parts & Accessories”. The seller is “mucinetto” and is located in Europe. This item can be shipped worldwide.

Leitz Wetzlar CM Polarizing Microscope Petrographic Pol. Please view pictures for details. It has Leitz Wetzlar 8x P eyepiece and P1 3,2:1 objective. The eyepiece has little cloudiness, objective, Bertrand lens and analyzer optics seem to be in good condition. Please note that Bertrand assembly stopping screw is replacement and analyzer is missing its calibration lever (please see the 17th pic). Also, it is missing the wave plate and condenser/mirror have some dust specks. Auctiva Free Image Hosting. Show off your items with Auctiva’s Listing Templates. Track Page Views With. Auctiva’s FREE Counter. The item “Vtg E. Leitz Wetzlar CM Polarizing Microscope Petrographic Pol” is in sale since Tuesday, July 25, 2017. This item is in the category “Collectibles\Science & Medicine (1930-Now)\Scientific Instruments\Microscopes, Lab Equipment”. The seller is “malak” and is located in Denver, Colorado. This item can be shipped worldwide.

LOMO Microscope Polarizing Petrographic MP-2 Vintage Mechanics works ok. Condenser prism has some fungus – see pictures. The item “LOMO Microscope Polarizing Petrographic MP-2 Vintage” is in sale since Sunday, April 03, 2016. This item is in the category “Business & Industrial\Healthcare, Lab & Life Science\Lab Equipment\Microscope Parts & Accessories”. The seller is “mucinetto” and is located in Europe. This item can be shipped worldwide.

Leitz Wetzlar CM Polarizing Microscope Petrographic Pol. Please view pictures for details. It has Leitz Wetzlar 8x P eyepiece and P1 3,2:1 objective. The eyepiece has little cloudiness, objective, Bertrand lens and analyzer optics seem to be in good condition. Please note that Bertrand assembly stopping screw is replacement and analyzer is missing its calibration lever (please see the 17th pic). Also, it is missing the wave plate and condenser/mirror have some dust specks. Auctiva Free Image Hosting. Show off your items with Auctiva’s Listing Templates. Track Page Views With. Auctiva’s FREE Counter. The item “Vtg E. Leitz Wetzlar CM Polarizing Microscope Petrographic Pol” is in sale since Friday, June 23, 2017. This item is in the category “Collectibles\Science & Medicine (1930-Now)\Scientific Instruments\Microscopes, Lab Equipment”. The seller is “malak” and is located in Denver, Colorado. This item can be shipped worldwide.