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Bausch & Lomb Antique Brass "harvard" Model Microscope With Wood Case Circa 1885 For Sale

Bausch & Lomb Antique Brass

Payment | Shipping BAUSCH & LOMB ANTIQUE BRASS "HARVARD" MODEL MICROSCOPE WITH WOOD CASE CIRCA 1885

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BAUSCH & LOMB ANTIQUE BRASS "HARVARD" MODEL MICROSCOPE WITH CHERRY WOOD CASE - CIRCA 1885 You are invited to purchase a relatively rare model antique brass microscope manufactured by the Bausch & Lomb Optical Company, Rochester, New York, USA. Offered here is a "Harvard" model microscope also known as B&L’s model 515-B microscope. The Bausch & Lomb Optical Company produced this model microscope from 1884 to 1896, but not in large quantities. This model microscope had a Continental horseshoe shaped base and came in two basic configurations: The model 515-A had a manual push/pull coarse focus system. The instrument featured here has a rack and pinion course focus system, which was designated by B&L as the Model 515-B. This model microscope was produced at a time when the B&L firm gave specific names to each of its microscope models including the top of the line instrument named “The Professional,” along with “The Investigator,” “The Model,” “The Family,” “The Physicians,” “The Library,” “The Students,” etc. This is a very stable and nicely proportioned instrument. But, it is a B&L microscope model that is not often seen today. Here is your opportunity to add this relatively uncommon B&L microscope model to your antique microscope collection. It comes in a Cherry wood case along with a brass canister for the storage of its objective lens. This microscope bears the name of the manufacturer engraved into the back of the rectangular stage, “Bausch & Lomb Optical Co.” However, on this instrument, that inscription is partly obscured by black paint on top of the stage – the black paint was likely added by a previous owner of the instrument. In addition, on the right side of the limb one finds engravings of the following U.S. Patent Dates: “Pat. Oct. 3, 1876” and “Pat. Oct. 13, 1885” (see close-up image of this inscription). These U.S. Patent dates engraved on the limb of this instrument highlight significant improvements to the design of the microscopes offered by the Bausch & Lomb Optical Company. The October 3, 1976 Patent date refers to U.S. Patent No. 182,919 that was awarded to Ernst Gundlach, Inventor, of Rochester, N.Y. Gundlach made several significant contributions to the design of microscopes offered by B&L during his relatively brief 2-year tenure with the company (NOTE: For more on the history of the B&L optical firm see below). This instrument features a version of Gundlach’s fine focus mechanism described in that Patent. The second U.S. Patent date of October 13, 1885 refers to U.S. Patent No. 328,277 that was awarded to Edward Bausch, Inventor, of Rochester, N.Y. This instrument features a swinging substage mirror assembly described in that latter Patent. NOTE: Copies of the drawings from these two Patents accompany this listing. As an added bonus, full copies of these U.S. Patents will be provided to the purchaser of this instrument. This instrument does not bear a typical serial number. For some unknown reason, Bausch & Lomb did not inscribe serial numbers on their earlier microscopes. Instead, they stamped the serial number of the instrument into the front lip of the floor of the wood cabinet, or, on the edge of the wood case that came with the microscope. In this case, we do not have the original wood case that came with the instrument. Instead we have a B&L Cherry wood case from the same era. However, given the fact that we have both US Patent dates inscribed on the limb of the microscope, we can conservatively date this instrument to circa 1885. Accompanying this listing is a catalogue cut of this particular model microscope extracted from the publication, "Manipulation Of The Microscope" by Edward Bausch and published in the year 1885. It is included for comparison with the instrument featured here. The exact similarities to the featured instrument are readily apparent. For the antique microscope collector – this B&L "Harvard" model microscope represents one of several significant advances in the evolution and design of the microscope pioneered by the Bausch & Lomb Optical Company. As such, it will be a most welcome addition to any antique microscope collection, especially since it is a relatively uncommon model. DETAILED DESCRIPTION: This microscope is built upon a heavy horseshoe shaped foot of black lacquered brass. Rising from the foot is a slightly tapered cylindrical black lacquered brass pillar that terminates in a compass joint. This joint supports the limb of the microscope, the stage and the swinging substage assembly. The limb, in turn, supports the remainder of the microscope including the body tube. The compass joint allows the microscope to be tilted at any angle from the vertical to horizontal to allow for the comfortable viewing of specimen slides. Coarse focus is by rack and pinion. Fine adjustment is by a micrometer knob mounted at the top of the limb. As the micrometer knob is turned a finely threaded screw acts on a patented double vane movement located inside the limb (see the Gundlach Patent diagram for the details on this mechanism). The microscope is equipped with a 57mm by 80mm rectangular stage with a 20mm central aperture. A pair of slide clips is found atop the stage. There is no condenser associated with this microscope. Below the stage is a plano-concave mirror assembly, which is adjustable on a dovetail slider either up or down within a brass bar. The mirror bar is able to pivot about the stage on a compass joint (the axis of which lies in the plane of the stage) such that it can be adjusted to any angle below the stage and even above the stage to provide incidental illumination to opaque objects (Note: Please see the accompanying composite image that shows the versatility of this arrangement). This is a simple modification of the Patented swinging substage mirror assembly that was first invented by the American Optician, Joseph Zentmayer in the year 1876. The brass body tube of this microscope includes a nickel-plated drawtube that is inscribed with millimeter markings from 160 to 240mm. At the top of the drawtube is a brass ocular holder. A single eyepiece is included with the microscope – a Carl Zeiss Jena ocular marked with the number “3.” When not in use on the microscope, the eyepiece is kept in a wood rack located inside door of the wood case. At the base of the body tube is a single objective lens that is unmarked as to power or manufacturer. However, it comes in a B&L brass canister marked “2/3-Inch.” Like the eyepiece, the objective lens in its brass canister is accommodated in a wood rack inside the door of the wood cabinet when not in use on the microscope. When the microscope is set in the vertical position with the drawtube fully nested within the body tube and when the body tube is racked down to its lowest level, the microscope stands about 11 inches tall. When the body tube is fully racked out and the drawtube is fully extended, this instrument stands about 15.5 inches tall. The microscope weighs 6 pounds. Accompanying the microscope is a nicely fitted wood cabinet, which appears to be made of Cherry wood. It includes a robust brass carrying handle. There is a place for a lock, but the lock mechanism and a key are missing. Inside the top of the case is a wood accessory drawer (no other accessories included) along with a wood rack on the door of the case that holds the eyepiece and objective lens in its brass canister. The exterior dimensions of the wood care are 13.75 inches tall, 6.75 inches wide and 7.25 inches deep. The microscope in its case weighs 10 pounds. STATEMENT OF CONDITION: 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 fine antique microscope. In summary, this microscope is in good to very good condition cosmetically, mechanically and optically, but with some relatively minor caveats as follows: As the accompanying images with attest, the lacquered brass on this instrument shows an overall haze of tarnish or oxidation. I would estimate the amount of original lacquer retention in the range of 85 to 90 percent. On the other hand, the brass does display a nice age patina that many collectors like to see. The top of the stage shows a good bit of wear, which is to be expected from use. As is noted above, the top of the stage appears to have been painted in black in the past, most likely by a previous owner. This paint is partly worn off and has partly obscured the manufacturer’s name on the rear of the stage. The optics associated with this microscope are of high quality, the eyepiece and objective lens being free of any optical defects. The optics produce sharp, high contrast images. In fact, this microscope can still be used for serious microscopical investigations to this day. The plano-concave mirror is in very good condition. Mechanically, both the coarse and the fine focus mechanisms work smoothly and flawlessly on this instrument. The wood cabinet that accompanies the instrument is in relatively good serviceable condition. However, as noted above, the case is missing both its lock and key. A small portion of the front floor of the case is missing, but the overall structural integrity of the case is preserved. This is not the original case for the instrument, but is a substitute B&L case from the same time frame as the instrument that it contains. Typically, both the interior and the exterior of the case have some scratches and dings, which are to be expected for a wood case of this vintage. Overall, this is a nicely preserved example of Bausch & Lomb Optical Company’s "Harvard" Microscope with its swinging substage mirror assembly. It is certainly worthy of any antique microscope collection, especially since it is a model that is not often seen. ABOUT BAUSCH & LOMB OPTICAL COMPANY: The Bausch & Lomb Optical Company (now known as Bausch & Lomb, Incorporated - B&L, Inc. for short) is one of the oldest continuously operating companies in the United States today. Bausch & Lomb traces its roots to 1853, when John Jacob Bausch, a German immigrant, set up a tiny optical goods shop in Rochester, New York. That early shop sold eyeglasses, magnifiers, microscopes, and other products imported from Europe. Shortly thereafter, when he needed additional capital, he borrowed $60 from his good friend Henry Lomb and offered as security the promise that, if the business ever grew to such an extent that he needed a partner, Lomb would be brought in. The business did grow, and a uniquely American optical partnership was formed. Early in the company’s history, Bausch made a discovery that led to eventual financial security for the business. Bausch found a piece of vulcanite rubber (a hard rubber used in hair combs) on the street. He discovered that it could be used to make eyeglass frames. Working on the stove in his tiny kitchen at home, Bausch perfected the molding of vulcanite rubber into eyeglass frames, which he fit with lenses imported from Europe and ground by hand in his small shop. In 1866, Bausch and Lomb started the Vulcanite Optical Instrument Co. The business began to market the unique frames, which proved to be more durable and less costly than the gold-filled metal or horn-rimmed frames on the market at the time. They also produced a line of magnifier frames. By the end of 1866, the company was making a simple microscope. However, it was not until the year 1874 that their first compound microscope was produced. In that year, the company name was changed to Bausch & Lomb Optical Co. The following year, Ernst Gundlach, a German-born optician, came to work for Bausch & Lomb, designing a full product line of microscopes. His 1876 Patent that covered several improvements to the microscope was incorporated into most of the stands offered by the firm. Gundlach left the firm in 1878, after a long dispute, but with the company retaining his several Patents. Bausch's sons, Edward, William, and Henry all helped to fill the gap after Gundlach's departure. The company, of course, prospered and is alive and well today.J.J. Bausch died in 1926 and Henry Lomb died in 1908. PURCHASE: THE MONTANA LOGGER is very pleased to offer this fine antique brass Bausch & Lomb "Harvard" Model Microscope along with a Cherry wood case for a very reasonable “Buy-It-Now” cost. We will also entertain reasonable offers for this fine instrument. NOTE: WE WARMLY WELCOME INTERNATIONAL buyers/BUYERS. WE SHIP WORLDWIDE. PAYMENT: Payment via PayPal is due within 3 days of purchase. Prompt payment is always very much appreciated. BEST OFFERS: Please plan to submit your best offers as early as possible during the listing period, preferably as soon as you decide that you would like to acquire the instrument. Due to the fact that we consider each and every offer on its own merits, we need some time to evaluate best offers. So, we may not be immediately available during the last few hours or minutes of the listing period to review and respond to last minute best offers. Thank you! Payment Back to Top
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Bausch & Lomb Antique Brass "harvard" Model Microscope With Wood Case Circa 1885:
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