Although designed much like a petrographic polarized light microscope, this monocular microscope from Bausch & Lomb is not equipped with either a polarizer or analyzer.

The large horseshoe foot and pillar units are cast into one piece of iron and painted black with a sturdy enamel. The limb is attached with a hinge to the pillar at one end and to the body tube through a rack mount on the other. The nosepiece contains room for three objectives, each of which rotate into position with a detent stop for accurate positioning. The body tube is three and a half inches long and has a Huygenian eyepiece. Focusing is accomplished through a knurled knob that controls a rack and pinion gear set designed to move the body tube with respect to the stage. The circular stage is graduated (much like a petrographic stage) and rotates a full 360 degrees. An Abbe substage condenser is illuminated with a substage double mirror, and both are attached with a rackwork mechanism. The microscope is finished in black enamel and brass, with the exception of the graduation scale on the stage, which is nickel plated.

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