This Continental Model B is a compound monocular with coarse and fine focus, rectangular black stage, inclination joint, sub-stage diaphram, adjustable sub-stage mirror bar (the mirror is missing), and horseshoe base. The inscription on the stage reads “BAUSCH & LOMB / OPTICAL CO.” The form was introduced in the early 1890s and, being relatively inexpensive, was soon used by many high school and college students.
Ref: Bausch & Lomb, Microscopes, Microtomes, Apparatus for Photo-Micrography, and Bacteriology (Rochester, N.Y., 1896), pp. 18-19.
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