Show use compressed air air Is 1 now used lit in the large laige tron iron foundry at the clady of the general electric corn pany for almost every operation atlon con necked with the making of a finished lini blied casting ALI though the machinery in the other adjacent shops is operated entirely liely by electric it in the iron foundry where the operations are scattered and intermittent corn com pleased all was found to be addan tadeous tor for small email power ser sen ices I 1 cea the TI 11 air la Is supplied at 80 pounds pound prel preB suie by a number of electric motor motoi driven of different calac ittes |