Some features and improvements on the high-voltage wattmeter

R. W. Sorensen: When I first saw the diagram of connections shown in this paper I was awed by the apparent amount of large apparatus necessary to construct such a wattmeter. However, I have had the opportunity to stop at Professor Ryan´s laboratory and became acquainted with the equipment described in this paper. An acquaintance with the equipment eliminated the impression of bigness which I had received from the diagram and which was perhaps due partly to the high voltages which the equipment will measure. In place of this impression I received a definite picture of the cleverness exhibited by Mr. Carroll and Professor Ryan in handling this problem. For example, the transformer of three windings and a split core, which seems in the diagram to be so large, is actually very small, in fact, it can easily be held in one hand.