Weston (of Newark, NJ) Electrodynamometer Milliammeter model 370 No. 1519. Measures small electrical currents, milliamperes. Reliable within .25%. To obtain greatest accuracy on direct current, reversed readings should be taken to eliminate the...
Bausch and Lomb abbe type refractometer measures the refractive index, how light passes through, an item. It was also used to determine the concentrations of solutions. There is a thermometer missing, which that helped to keep the liquid at a...
