Ed Lutz, Paris
Babinet-type goniometer, 40 cm high which can be adjusted upwards to 55 cm. The circle is 18 cm diameter, engraved every 1/2 degree for the full 360 degrees. Read by two one minute verniers. Collimator tube and viewing telescopes are 16 cm long. It has a precision leveling system for the central glass pad.
Signed Ed Lutz, Paris, 4th quarter 19th century.
Collection: Mark McElyea