i of these concave electrodescoincide nearly at the centre of the * bulb, atwhich point is located a V-shaped sheet ofplatinum, iron, a small piece of iridium, orother piece of metal. This could be supportedin any way desired, but it may be suggested, asa convenience, that it be mounted on a third… … ^ \ \ FOR EVERYBODY. 27 which alternately become cathode during thedischarges and cause the Rontgen rays to beemitted from the apex of the platinum sheet orfrom the surface of the piece of metal placedat the common focus. With oscillatory currentsfrom a Ruhmkorff coil the same connectionsmay be…
X-rays · Fluorescence
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