Discussion on “electrical transmission of electrical measurements” (Bliss).: “metering large direct-current installations” (Magalhaes).: “measurement of energy with instrument transformers” (Maxwell).: “whe

William J. Mowbray: It is somewhat presumptuous for me to congratulate Mr. Ingalls on this paper, but I will presume to do so, because I think that I can claim being the originator in the United States of the rotative watt-hour test meter. Some six or seven years ago, I think perhaps it was in 1905, the Chairman of this meeting, Mr. Robinson, presented a paper entitled “The Oscillograph” at a meeting of the Institute held in New York City, and at that same meeting I had the honor of presenting a paper which disclosed for the first time the method of testing watt-hour meters with a rotative watt-hour test meter having several current and potential windings. The paper was entitled “Maintenance of Meters,” and brought in the rotative test-meter. At that time this method of testing service meters was not generally used at all having just been started in Brooklyn and New York. Boston was then using a standard resistance voltmeter and stop watch. But I see that Boston has now fallen into line, and is not only using the rotative watt-hour test-meter, but has added to the method of using it a degree of refinement that is characteristic of Boston. I congratulate Mr. Ingalls on this method which seems to be very clever and refined and just the thing for testing these large meters on fluctuating loads.