Rollins, William Herbert, 1852-1929 · Boston : The University Press · leaf 740
NOTE 179 D —FIGURE 5 —A HINGED FARA-DAY RING FOR ETHER AND ELECTRONTHERAPEUTICS Plate 144 … NOTE 179 D — FIGURES 6 AND 6 A —DETAILSOF A MULTIPLE SERIES SPARK-GAP It consists of a micanite tube containing a row of metalballs, as shown in Note 112. Instead of attaching the ballsto a strip of mica, as in the illustrations to Notes 112, 137,140, holes are bored through the wall of the…
X-rays · Phototherapy
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