spension from a lamp-socket, or of a box onwhich the lamps stand erect, side by side, and which is very apt toget knocked over. The design which I show is a kind of universallamp-resistance, and is of a much more compact nature, consistingof a circular brass band, in which the lamp-holders are… … Fig. 33.—Lamp-Board foe, Charging (Schall). cord, and by combining lamps of different candle-powers we can getalmost any current we like. It hangs up, out of the way, from anylamp-socket. We only need to know how much current passes through eachkind of lamp, and this is most easily calculated from…
X-rays · Radiography
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