Signedplaque on front of instrument: Precision-Wattmeter / Max. E.M.F. 30 Volts / Max. Current 25 Amp. / Siemens & Halske;
plaque on front of instrument: imported By / James Biddle / Philadelphia U.S.A.;
plaque on front of instrument: Germany
Inscribedprinted on top edge of case: E J J E;
on side of case: 248531;
Case marked "PROPERTY OF HARVARD ENGINEERING SCHOOL"
FunctionAn instrument for measuring the electric power in watts of a circuit.
Historical AttributesOriginal University Dept.: Engineering School. Removed to this collection 11/56.
ProvenanceFrom Harvard Engineering School 11/56.