The black base is shaped like an elongated octagon. The base supports a mirror and the mirror's stand. There is also a peg that supports the prism apparatus when it is opened. There are two prisms hinged together below the observing scope. A red rubber tube connects the two prisms by attaching to knots located on each prism. The rubber tube is worn and cracked from age. The tube is nearly severed all of the way through where it is attached to the knobs. The scope is approx. 13 cm long and 3 cm in diameter. It is bronze and has a bronze dial at the bottom right that is marked in increments from 0-10. There is a Celsius thermometer protruding from one of the prisms. It is approx. 13.2 cm and is marked in 10 degree increments. Color: BK,BZ,RD
Purchase:
Gift:
Found in Collection:
Institution:
Institution