Bausch & Lomb Optical Co., Serial No. 7516

Pat. Oct. 3, 1876 and Oct 13, 1885

An uncommon variant of the Physician's Model microscope with a tripod base, c. 1889

Bausch & Lomb Optical Co., Serial No. 7516. An uncommon variant of the Physician's Model microscope with a tripod base, c. 1889

    Bausch & Lomb Optical Co., Serial No. 7516. An uncommon variant of the Physician's Model microscope with a tripod base, c. 1889

Bausch & Lomb Optical Co., Serial No. 7516. An uncommon variant of the Physician's Model microscope with a tripod base, c. 1889

    Bausch & Lomb Optical Co., Serial No. 7516. An uncommon variant of the Physician's Model microscope with a tripod base, c. 1889

Bausch & Lomb Optical Co., Serial No. 7516. An uncommon variant of the Physician's Model microscope with a tripod base, c. 1889

Bausch & Lomb Optical Co., Serial No. 7516. An uncommon variant of the Physician's Model microscope with a tripod base, c. 1889. Glass stage and slide carrier

Bausch & Lomb Optical Co., Serial No. 7516. An uncommon variant of the Physician's Model microscope with a tripod base, c. 1889. Accessories

    The microscope is furnished with two B&L objectives marked 2/3 and 1/5 each with canister, two eyepieces, the nickel plated slide carrier (patented in 1877), a sub-stage Wale type iris diaphragm, a parabolic dark field condenser, and a double objective changer. The serial number, 7516, is stamped into the inside bottom of the storage case.

Bausch & Lomb Optical Co., Serial No. 7516. An uncommon variant of the Physician's Model microscope with a tripod base, c. 1889. Storage case

Bausch & Lomb Optical Co., Serial No. 7516. An uncommon variant of the Physician's Model microscope with a tripod base, c. 1889. In the storage case

The following was extracted form The Journal of the Royal Microscopical Society, 1886

Bausch and Lomb Optical Co.'s Physician's Microscope - The special features of this instrument (fig. 114) are the fine adjustment (described in Vol. II., 1882, p. 683), the cradle-joint for inclining, and the glass stage. The latter rests on a forked support and could be made to give in a different form one advantage of Mr. Nelson's divided stage, as with glass the position of the illuminating apparatus would be readily seen. The slide-carrier would, however, require to be altered, so as not to impede the view beneath the stage. There is a removable substage and diaphragm. The pillar and arm, in the original form, were marked so as to indicate the correct inclination of the body in the use of the camera lucida. The mirror is attached to a swinging tail-piece.


The microscope shown on this page is an example of a later version Physician's model. It differs from the one described in the Journal in having a brass tripod base as opposed to the more typical cast iron claw base and in having the upper section of the draw-tube nickel plated. It is otherwise very similar to the illustrated microscope. This instrument represents a final version of this model. By the end of the century, the microscopes produced by the firm were largely in the "continental" style. Two earlier versions of the Physician's model from 1879 and 1883 are also represented in this collection.

    Bausch & Lomb  Physician's microscope

 

This model was also described in the Sharp & Smith Catalog of Surgical Instruments, 1889 as follows:

Sharp & Smith catalog of surgical instruments 1889

    Note that at the request of the purchaser, the microscope could be furnished with an alternate base. Evidently, in this case, the microscope has the brass tripod base normally associated with the Investigator or Universal models. This particular variant is rather uncommon; we have seen only one other example of a Physician's model with a brass tripod base.

 

The glass stage and slide holder are described in Gundlach patent Dec. 25, 1877

The glass stage and slide holder are described in Gundlach patent Dec. 25, 1877

The fine adjustment is described in Gundlach patent Oct. 3, 1876

The fine adjustment is described in Gundlach patent Oct. 3, 1876

Bausch and Lomb microscope patent us328277

B&L patent Oct. 13, 1885

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