Conditions of sensibility of photo-electric cells with alkali metals and hydrogen . tube is attached aniron ring which fits neatly inside the larger tube. By means of anelectromagnet, using a current of 2 amperes, the inner tube carryingthe anode a, can be held in any desired position relative to thecathode c, at the bottom of the l ulb. At the bottom of the bulb and diametrically opposite the anode,a, is sealed the cathode, c, the upper point of which does not extendbeyond the surface of the inside of the bulb. In some of the cellsthe inside of the lower surface of the bulb was silvered, the
Conditions of sensibility of photo-electric cells with alkali metals and hydrogen . tube is attached aniron ring which fits neatly inside the larger tube. By means of anelectromagnet, using a current of 2 amperes, the inner tube carryingthe anode a, can be held in any desired position relative to thecathode c, at the bottom of the l ulb. At the bottom of the bulb and diametrically opposite the anode,a, is sealed the cathode, c, the upper point of which does not extendbeyond the surface of the inside of the bulb. In some of the cellsthe inside of the lower surface of the bulb was silvered, the metaldistilled into it and deposited upon the mirror surface. In this waya good contact was insured between the pl-^tinum and the metal. Insome of the tubes the metal was not disti^led into the bulb butpoured into it while in the molten state and allowed to solidify overthe platinum electrode. The metal in all cases was used as thecathode of the cell. A beam of light could be passed through thewalls of the bulb and thus be incident upon the active metal directlyunder the FIG. 4.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1912
