Spherometer (0433)
Info
Spherometer with curved legs. Believed to be Cauchoix. Guess 1800-1820.
Served for measuring lenses en thickness of thin flat surfaces and to check the radius equality of lenses.
No inscriptions on the instrument.
Remarks:
Could not find spherometer with curved legs. All seem straight.
References/Links/More Info
Wikipedia Robert-Aglaé Cauchoix