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 1442
SERIES MAGNET ITCH SHUNTMAGNET … Fig. 667 DIAGRAM OF CONSTANT-CURRENT SERIES ARC LAMP MECHANISM, wrong plugging of the switchboard. The lamps will nowburn upside down/^ or^ in other words, the bottom carbonwill be the positive one. In such a case, if let go, thecarbon holders of the lamp will be burned and the lampwill burn for…
