. The London, Edinburgh and Dublin philosophical magazine and journal of science. OR. © Point Negj live ii ; / / n-M Jy Fig. 1.—Steady Current Curves. i 5 .a | 4 1 + Po !-9 Volt 3 1 SPq M2Vo1int Negiuve 7. 1 /f ^=r 1 —/■ --^ / 2 J 1 i - y \ \ \ \ ■ Fig. 2.—Power Curves. CARBORUNDUM DETECTOR. Point Negative Point Positive Fig. 3.—Sensitiveness = 0-2xl0~8 Watt. 40 40CA,B a,b A/ le / $ 30 ®Bln It end [eX -7 - ~f / —tr6 L/ 20 200100 * y 3 1—1i / / .■■% f-C ^H X -/ / , / // / / .<-- r 10 f ■%■ Blunt en d Negauve ° Blu Volt 0 y ./*; ^:-b Fig. 6.—Sensitiveness Watt. :
. The London, Edinburgh and Dublin philosophical magazine and journal of science. OR. © Point Negj live ii ; / / n-M Jy Fig. 1.—Steady Current Curves. i 5 .a | 4 1 + Po !-9 Volt 3 1 SPq M2Vo1int Negiuve 7. 1 /f ^=r 1 —/■ --^ / 2 J 1 i - y \ \ \ \ ■ Fig. 2.—Power Curves. CARBORUNDUM DETECTOR. Point Negative Point Positive Fig. 3.—Sensitiveness = 0-2xl0~8 Watt. 40 40CA,B a,b A/ le / $ 30 ®Bln It end [eX -7 - ~f / —tr6 L/ 20 200100 * y 3 1—1i / / .■■% f-C ^H X -/ / , / // / / .<-- r 10 f ■%■ Blunt en d Negauve ° Blu Volt 0 y ./*; ^:-b Fig. 6.—Sensitiveness Watt. :.--«- e-® b 0 1 2 3 4 5 6 7 6 -w,,9 * 2 1 . 3 0 4 0 Fig. 5 •—Power Curves. Fig. 4.—Steady Current] Curves. e 1 I I / + 2 r*» egatta / J u 0 04 0 0 9 10 ZINCITE-CHALCOPYRITE DETECTOR. / /b / / / / / / V / ■osiliveF. (+0-4(-0 4 Volt)Volt) // / „ /, / 0 w I 2\ Fig. 7.—Steady CurrentCurves. Fig. 8.—Power Curves. GRAPHITE-GALENA DETECTOR. Zincite Negative Zincile Positive Fig. 9.—Sensitiveness : P. e (+0-2 a ■,. 11 6 Volt ^ ■ -c w e $ S ~^ V V Fig. 11.—Power Curves. Graphite Negative Graphite Positive Fig. 12.—Sensitiveness ;r8Watt. Fig. 10.—Steady Current Curves. THELONDON, EDINBURGH, and DUBLIN PHILOSOPHICAL MAGAZINE AND JOURNAL OF SCIENCE. [SIXTH SERIES.] OCTOBER, 1910. LVIII. The Specific Charge of the Ions emitted by Hot Bodies.—II. By 0. W. Richardson, , , Professor ofPhysics, and E. R. Hulbirt, , Princeton University*. IN a previous communication f one of the authors deve-loped a method of measuring the value of ejm for theions emitted by hot bodies and applied it to the case of theions of both signs from platinum and carbon. As was to beexpected from the results of earlier investigations, the valueof the specific charge for the negative ions was found tocorrespond to that for the negative electrons, whereas thenumber obtained for the posit
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectscience, bookyear1840
