Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1481
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 After thishas set a little, the wooden template is withdrawn, the car-bon is inserted in the cavity left by its withdrawal, and thespace left unfilled is filled with the…
