Signedplaque on front panel: AMMETER / PAT. JULY 16, 95 APR.2.2901 JUNE 1, 1909 / GENERAL ELECTRIC CO. / SCHENECTADY, NY., U.S.A.
Inscribedstampled on bottom of wood case: PROPERTY OF / HARVARD ENGINEERING SCHOOL
below scale: TYPE P4
FunctionAn ammeter is used to measure relatively large currents.
ProvenanceFrom the Harvard Engineering School (established in 1918).