Electric switch and controlling gear. A handbook on the design,manufacture and use of switchgear and switchboards in central stations,factories and mines: By Charles C. Garrard,Ph.D., M.I.E.E., A.Am.I.E.E. Third edition,revised and enlarged. xiv-783 pages, 23 × 15 cm., cloth. New York,D. Van Nostrand Company,Inc., 1927. Price, $18 |