Identifier: s05philosophicalmag20londuoft (find matches)
Title: The Philosophical magazine; a journal of theoretical, experimental and applied physics
Year: 1798 (1790s)
Authors:
Subjects: Physics
Publisher: London Taylor & Francis (etc.)
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: Ontario Council of University Libraries and Member Libraries

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berates a milligramme of hydrogen,ch its intensity in mechanical measure, N the number of moleculesof hydrogen in a milligramme; the milligramme contains then 2)Siatoms, and these bring the quantity c7i/2 of positive electricity tothe kathode, by which n = l. Hence the quantity which is attachedto an atom is ^7^ 4N In this we have approximately* in mm., mg., sec, c = 3 10, 7i=957;and further, according to the theory of gases, N=14-10. This ^^®^ E = 0-00000051 mg.^ mm.^ sec.-. This value is thus the probable Atomic quantity of Electricity.It may be a multiple, but with the same probability with whichC=12, and not 6, or 3, is E the quantity of electrical elementaryparticles, Eor even if electricity can be split into smaller partsthan E, it is not clear uhy such a smaller part is never met within experiment.—Wiedemanns Annolen, Ko. 8, 1885. * Conf. Wiedemann, Galvanismus, iii. p. 450; and 0. E. Meyer, JTiwc-tische Theorie der Gase (Breslau, 1877), p. 234. Phil Mag. S. 5 .Vol.20 Pi. IX
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Minterrv Broslit-K THE LONDON, EDINBUROH, and DUBLIN PHILOSOPHICAL MAGAZINE AND JOUIINAL OF SCIENCE. (FIFTH SERIES.) OCTOBER 1885. XXXIV. On the Electric Conductivity of Gases.By F. Stenger*. (Plate IX.) THE present research has two objects. In the first part,the author endeavours to show, partly by use of theunusually rich literature of the subject, and partly from hisown researches, that there exists no distinction universallyapplicable between the arc-discharge and the glow-discharge.Upon what factor the a))pearance of the one or other of thetwo forms depends, and under what experimental conditionsthe two forms of discharge can pass into each other, will formthe subject of the second part. Part I. I may be allowed, in the first place, briefly to place togetherthe essential characters of the arc-discharge as distinguishedfrom the glow-discharge ; and for this purpose I confinemyself entirely to the normal form of discharge. (1) The gas-stratum in the arc-discharge possesses a muchsm

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