Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1475
t is slipped a strawboard tube. The objectis to prevent the zinc of two batteries from touching eachother so as to establish a wrong connection. The negativeelectrode is a plate of carbon. This is placed in the centerof the zinc, and is so supported as not to touch it in anyplace. Carbon and zinc… … Fig. 692 DRY CELL Ammonium chloride^ zinc chloride, 1 part of each, plasterof Paris^ 3 parts, flour 0.87 part, water 2 parts. After thishas set a little^ the wooden template is withdrawn^ the car-bon is inserted in the cavity left by its withdrawal, and thespace left unfilled is filled with the…
