Meadowcroft, Wm. H. (William Henry), 1853- · New York : The American Technical Book Co · leaf 163
ss en-tirely through them and leave no shadow of themupon the plate. 152 The A B C of the X Rays. Before dealing with the manipulation of thelarger sizes of exciting apparatus we shall sug-gest to the reader more in detail the idea of thevariable spark gap in the circuit leading fromthe secondary… … Fig. 33. AA, Wires leading to discharge terminals of coil; BB, Wires leadingto tube. practical method of making the variable sparkgap. It will be seen that there are four stand-ards arranged in two pairs upon a board. Eachof these pairs has the ends of the standards bentand pointing toward each…
X-rays
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