Twentieth century hand-book for steam engineers and electricians, with questions and answers .. (1905)
Swingle, C. F. [from old catalog], Horstmann, Henry Charles, 1858- [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] · Chicago, F. J. Drake & co. · leaf 574
carbon is positive. This causes the light emitted fromthe crater to be projected upwards. The arc lampframe is supplied with a shade on which the light castfrom the arc is reflected downward. The advantage ofthis system is to obtain a better diffusion and distribu-tion of the light beneath the arc… … 156 ELECTRICITY FOR ENGINEERS The carbons should rest in contact when the lamp iscut out. When the switch is opened, part of the cut-
