Universal Wiring Computer.
NY: The W. J. Johnston Co., Ltd., 1891. 8vo. 44pp. Light shelf wear to spine ends & foot cover corners; light rubbing to covers; light yellowing to pages. Previous owner's name to ffep. For determining the size of wires for incandescent electric lamp leads and for distribution in general, without calculation, formulae or knowledge of mathematics w/ some notes on wiring and a set of auxiliary tables. Very Good Cloth (Item ID: 61846)