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  Bausch & Lomb Jug-Handled Microscope

  The compound microscope is made from brass and japanned brass. The microscope stands on a Y-shaped stand which is connected to the pillar. The pillar ends in an inclination joint which allows the microscope to be angled for observation. The fixed square stage has stage clips that hold the specimen in place; however, one clip is missing. The sub-stage mirror is held in a gimbal on an arm. The microscope has a signature "jug-handled" limb as it resembles a handle. The body-tube has an extension with measured markings, which via a sliding mechanism, can extend the length of the body-tube in order to focus. The coarse focusing functions via a rack and pinion mechanism which is controlled by a thumbscrew on the side of the body tube. Fine focus is controlled by the small thumbscrew on the top of the pillar. The instrument has the serial number "101809" etched into a black plaque on the base. The instrument has a triple nose piece which can be rotated and adjusted. The case is made from wood and has a brass carry handle. The case has a draw in the top left corner for the objectives and eye pieces.
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  Bausch & Lomb Universal Microscope

  The universial microscope is made from brass and stands on a flat tripod foot. The limb is split into two by an inclination joint that allows the microscope to be angled for observation. The circular stage is missing its two stage clips which would hold the specimen in place. The monocular microscope has a substage aperture iris diaphragm which can be rotated to adjust the aperture. The arm of the mirror and condenser can be slotted into each other and are connected to a circular joint next to the stage which allows them both to be rotated. However, the microscope is missing its substage mirror and the two arms do not seem to slot into one another as they should. The coarse focusing functions via a rack and pinion mechanism which is controlled by the large thumbscrew on the side of the body tube. Fine focus is controlled by the small thumbscrew located on top of the limb. The microscope is signed "PAT. OCT. 3, 1876, PAT. OCT. 13, 1885" on the side of the pillar and "Bausch & Lomb Optical Co." on the stage. The mahogany case has a brass carry handle and is secured by a lock and key; however, the key is not present with the instrument. The case has an interior draw that holds the slides and accessories. The interior also has compartments for the objectives and ocular lenses, with the top compartment lined with blue velvet. 
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  Bausch & Lomb Microscope

  The monocular compound microscope has a tripod base with the arm and stage in a cradle joint. The stage revolves, and has two indexed swinging arms below the stage. These arms are dovetailed for the substage condenser, which has a wheel of stops and a swing out holder for a dark field disk (which is present,) and for the concave mirror, which can swing below or above the stage. It has a single nosepiece and on the arm, below the focus knobs, are the patent dates for October 1876 and October 1885. "Bausch & Lomb Optical Co" is engraved on the revolving stage. The microscope has a single draw tube which is nickel plated. This microscope is very similar to number 170 in Billings Collection, noting that it has a single nosepiece and a single draw tube. The case is in serviceable condition, but shows the signs of extensive use. There are cracks on the back, the bottom has a crude repair on the front under the door. The lock is complete and seems to be functional, but the locking tab has been removed from the door and a swinging home made latch secures the door closed instead. The key is present in the drawer in the case. The top handle is missing and there is a picture of a dignified man on a Tennessee Walking Horse pasted on the back inside of the case.
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  Bausch & Lomb Compound Microscope

  The monocular microscope has a cast iron horseshoe base. The pillar, cast as one piece, and the limb is made of iron and painted black. The brass arm supports the body-tube, which has a triple nosepiece. The coarse adjustment is by rack work, and the screw for fine adjusting is on top of the limb. Below the square stage are a swinging Abbe condenser, an iris diaphragm, and a concave substage double mirror. The microscope is signed: "Bausch & Lomb Optical Co. Rochester, N.Y." Serial number 104100 is engraved at the end of the tube. The wooden carrying box has a crack in the back of the box from top to bottom. The case has some signs of wear and tear with a lock without a key.