Abstract :
P. A. Borden (The Bristol Company, Waterbury, Conn.): In reading Professor Marshall´s paper I could not but be reminded of the somewhat similar work described in a paper which I presented before the Institute several years ago.1 At that time, however, many of the modern units which Professor Marshall has been able to utilize in making his apparatus portable were not available. As a result, the apparatus which I described could not in any sense be considered as portable. It was possible, though, with this equipment to obtain extremely satisfactory results in the measurement of a-c quantities where the amount of power available for purposes of measurement was negligible in magnitude.
