primary circuit. It consists of a cylinder of hard wood or vul-canite, 1 inch long and 1 inch in diameter, towhich are affixed two brass strips ^ of an inchwide. These strips are L shaped and are setopposite each other, with their edges flush withthe surface of the cylinder. See Figures $and 6. At… … figure 7.and on each side of it is a spring brass contactpiece. See Fig. 7. The discharging apparatus next claims ourattention. The supports are to be made of heavy glass Brass Cap
X-rays · Fluorescence
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