Correspondence passed among investigators from September 1928 to February 1934. Letters to G.A. Pennock from Dr. Elton Mayo examined blood pressure, visits, generalizing mind for administration and societal changes; biological measures needs,...
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...
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, of 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...
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...
Weston (of Newark, NJ) Electrodynamometer Voltmeter model 341 No. 2104. Measures the voltage of an electrical circuit. Reliable within .25%. To obtain greatest accuracy use the formulas on the authentication certificate. No correction for...
