Description

An ammeter consisting of a metal piece mounted on a circular wood board with a glass cylindrical case over the instrument. The top of the instrument has an instrument dial with a pointer and a scale that goes from 0 to 100. Four smaller instrument dials are mounted on the main dial. These are labeled 100,000, 10,000, 1,000, and 100.

Ampere hour meter measure electric current as a function of time.