. La Londres, Édimbourg et Dublin philosophical magazine et journal of science. aussi le diagramme 7.)condensateur MICA (charge normale  = 2 050 microcoulombs). Moment de la charge. Cent-millièmes de seconde. Charge de condenseur.Microcoulombs. 1-26 3-78 2-52 3-78 1-33 5-04 071 312 275 6-30 7-56 1-65 8-82 1-72 2-26 241 101 11-3 12-6 13-9 1-83 2-15 1-89 151 164 212 17-6 1-93 18-9 20-2 1-96 21-4 2-06 209 227 271 2-00 2-02 36-1 2-02 Phil Mag. S. 5. 34. N° 210. 1892 novembre. 2 F 406 sur les oscillations de la charge d'un CondenserDiagram 7. (Voir Tableau XI) mi ? ?  ? ? ? ? ? ? ? Mm m mm ? ? ? ? ? ? ? Iiim 111 MRKff

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. The London, Edinburgh and Dublin philosophical magazine and journal of science. also diagram 7.)Mica Condenser (normal charge = 2 050 microcoulombs). Time of Charging. Hundred-thousandths of a second. Charge of Condenser.Microcoulombs. 1-26 3-78 2-52 071 3-78 312 5-04 1-33 6-30 275 7-56 1-65 8-82 241 101 1-72 11-3 2-26 12-6 1-83 13-9 2-15 151 1-89 164 212 17-6 1-93 18-9 209 20-2 1-96 21-4 2-06 227 2-00 271 2-02 36-1 2-02 Phil Mag. S. 5. Vol. 34. No. 210. Nov. 1892. 2 F 406 On Oscillations in the Charging of a CondenserDiagram 7. (See Table XI.) mi ?? ??????? mm m mm in ??????? iiim 111 MRKffllllH HUN ii fly& £?** di lllfll |am ?? [HI ? 20 30 Hiudred-thonsandthiri of a second, lime of charging. The resistance of the circuit in this determination was about0#03 ohm, and the condenser was charged by means of thewell-known von Helmholtz pendulum*, manufactured byL. Zimmermann, of Heidelberg. The usual manner ofmaking the connexions was, however, slightly modified, asindicated in fig. 4. Fig. 4. Battery ^ Earth Condenser Earth. The sections of the two steel bars attached to the lower partof the pendulum proper are denoted by A and B. Thebattery was always in connexion with A and insulated from B. * Helmholtz, Monatsberichte der Berliner Akad. May 25, 1871, p. 294. Lord Rayleigh on hderference Bands, 407 The binding-posts denoted by P and the metal parts attachedto them were insulated from each other by being fastened tohard rubber bases. As arranged, the circuit was completedby A coming in contact with the lever C, and broken by Bcoming in contact with the lever D. In order to insuregood contacts the surfaces at the points where the circuit wasmade and broken were plated with gold. By means of themicrometer-screw attached to one of the hard rubber bases, the time between the contacts that made and broke thecircuit could be varied. One complete turn of the drum, which was subdivided into one hundred divisions, corre-sponded to a difference in time of contacts, and conseque

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