Illustration found with this microscope. Note the alternate placement of the fine adjustment knob.:
G. Langguth Jr., Optician, Chicago
c. 1865
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Illustration found with this microscope. Note the alternate placement of the fine adjustment knob.:
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There is evidence that this microscope and similar microscopes signed by other makers were actually made by Samuel Murset of Philadelphia. J. G. Langguth Jr. was an importer and dealer in optical goods located at 117 Randolph St, Chicago.