Max Kohl A.G., Chemnitz
Stone/marble base 15 cm diameter with inset circular mirror, overall instrument height is 41 cm. Two parallel steel pillars carry a rotatable Nicol prism sitting in a 360 degree graduated circle, three swing away condenser lenses, and a swing away gimbaled holder at mid height with outer graduated circle. There is also a lower rectangular tilting glass plate. An accessory is a removable adjustable dark mirror that will sit in either the inset over the base mirror or in the upper graduated circle when the Nicol prism assembly is removed.
See MM Instruments
for more details on this instrument
collection Mark McElyea