Discussion on “alternating-current motors for the economic operation of mine fans” (Crosby), Pittsburgh, Pa., April 18, 1913. (see proceedings for April, 1913)

C. W. Beers: The title of Mr. Crosby´s paper is apt to convey, to my mind, something misleading. It deals with the motor side of the question and leaves out the fan side of the question, and I would like to give a few points in regard to the fan operation. I have read the article by Mr. Crosby with considerable interest, as to me much of the subject matter as presented by Mr. Crosby is new. I was somewhat disappointed, however, to note the apparently small amount of attention that he paid to fans operating in the anthracite region, which, with few exceptions, require small driving power.