Signedon top: METER / - HEATING ELEMENT + / FOR USE WITH / THERMO AMMETERS / MADE BY / WESTON / ELEC INSTRUMENT CORP / NEWARK N.J. U.S.A / HEATER
Inscribedon paper on bottom: TYPE "C" HEATING ELEMENT / THIS IS A COMPENSATED / THERMO-COUPLE TYPE / HEATING ELEMENT AND / CAN BE USED FOR D.C. / AND FOR A.C. OF ANY / FREQUENCY INCLUDING / RADIO FREQUENCIES / RANGE 2 AMP. / MAX CURRENTCAP 2 AMP / ADJUSTED WITH / MOD 412 NO 1435
FunctionRP3 Heating element for use with thermo ammeters.
ProvenanceFrom the Department of Physics, Harvard University.