Browse Items (327 total)

Bausch & Lomb, Wedge Prisms (2)

Small wedge prisms in a box

Bausch & Lomb, Plano Prisms

Box of Plano Prisms

Bausch and Lomb, Rectangular Mirror

Rectangular mirror on extension arm

Bausch and Lomb, Projection Lens

Projection lens - 10" E.F. f:4.5 AS6747

Bell, Electrical Probe

Wired probe

Bristol's, Bristol's Recording Volt Meter, www.lowell.eduwww.lowell.edu

Bristol's recording volt meter

Cambridge Instrument Co., LTD, Galvanometer

Device used to measure small voltages

Central Scientific Co., Galvanometer

Device for measuring small variations in low voltages

Central Scientific Inc., Cenco Slide Rheostat

Device for variably adjusting line voltage

Elgeet, Movie Camera Lens

16mm movie camera lens