E. P. Allis and Co
Edward P. Allis and Co of Milwaukee, engineers.
Early maker of roller milling machinery.
1893. Exhibited a quadruple expansion engine at 1893 Chicago International Exhibition.
1899 Won a contract to supply engines for the Glasgow Tramway electrification
1901 The American business of Fraser and Chalmers in Chicago was sold by the parent company and (along with the Gates Iron Works of Chicago) merged with Edward P. Allis and Co of Milwaukee, to form Allis-Chalmers Co. 
1907 Advert (Sheffield): 'POWER STATION PLANT FOR SALE. The TRAMWAYS COMMITTEE are prepared to receive offers for the following PLANT (all in good working order), which is being replaced by larger units at the Tramways Power Station, Kelham Island, Sheffield:
Sources of Information
- Sheffield Daily Telegraph, 9 March 1907
-  Mills Archive