Polarized Light Microscope; No. 218
Age:  c1880
Made by: Unknown
Made in: Probably England
Polarizing Light Microscopy
Imaging
This unsigned, all brass monocular compound microscope is patterned after the popular Ross models of the mid-19th Century. Andrew Ross (1798-1859) microscopes are characterized by the Y-shaped foot, heavy supports, or trunnions, and limb & arm mechanism that carries the body tube.

This microscope comes with two objectives attached to a pivoting mount, has both coarse and fine focus, a detachable epi-illuminating lens, and magnetic slide holder. There are two condensers: one fitted with a Nicol polarizer, the other is an "Achromatic" condenser. A four-position substage stop (with no optics) is also included. Additional accessories are selenite test slides and a live-box specimen holder. The microscope is 17 inches tall.

This polarizing microscope, or "Polariscope" includes a Nicol prism polarizer, that screws into the stage (shown), and a Nicol prism analyzer that screws into either objective. The microscope is shown here with the optional neutral density filter (above the eyepiece). This specimen comes with a mahogany carrying and accessory case.

Thanks to RM for photographic expertise.

Contact: Steven Ruzin, Ph.D Director of the CNR Biological Imaging Facility
and
Curator of The Golub Collection
located in
Valley Life Sciences Building, Onderdonk Lobby
The University of California at Berkeley, USA
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