Electricians' operating and testing manual; a hand book for men in charge of electrical apparatus, repair men, trouble men, lamp trimmers, and electricians generally
A practical handbook of 1916 by Henry C. Horstmann and Victor H. Tousley, published in Chicago by F. J. Drake & Co. for repair men, trouble men, lamp trimmers and others tending electrical apparatus. The 148 figures are line-drawn wiring diagrams: coils as hatched rectangles, switch blades, rheostat contact fans, armatures and lamps, useful as spare schematic marks and circuit ornament.
