Addyman, Frank Thornton · London : Scott, Greenwood & co. · leaf 125
ohm double-bulb tube, shown in Fig. 34. During exhaus-tion the larger bulb has been heated, but not the smaller•one. This makes a peculiar difference. Single bulb tubes -are always heated, because the innersurface of the glass has a condensing action on the air, pre-venting its thorough removal by… … Pig. 34.—Double bulb Focus Tube (Bianodic). A further advantage of tubes with double anodes is thattheir vacuum can, to some extent, be regenerated by reversingthe current. If the current be reversed through a Jacksontube, the diagonal platinum plate becomes a cathode, and theconditions are…
X-rays
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