Standing only 7/8-inch high, this miniature brass-plated loupe-style microscope was made sometime after 1850. The original model, from which our 3-D Studio Max drawing is derived, resides in the Billings Microscope Collection at the National Museum of Health and Medicine at Walter Reed Army Hospital in Washington, D. C.

Four oval holes cut into the sides of the tube allow light to enter, presumably to illuminate opaque specimens. There is a single bi-convex lens at one end of the instrument, which is the only optical element present in this simple microscope. A ring on the side of the tube allows the microscope to be attached to a watch chain.

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