xxiv
CONTENTS.
Art.
Page
222. Measurement of the potential of a conductor without touching it
276
223. Measurement of the superficial density of electrification. The proof plane
277
224. A hemisphere used as a test
278
225. A circular disk
279
226. On electric accumulators. The Leyden jar
281
227. Accumulators of measurable capacity
282
228. The guard-ring accumulator
283
229. Comparison of the capacities of accumulators
285
PART II.
Electrokinematics.
The Electric Current.
230. Current produced when conductors are discharged
288
231. Transference of electrification
288
232. Description of the voltaic battery
289
233. Electromotive force
290
234. Production of a steady current
290
235. Properties of the current
291
236. Electrolytic action
291
237. Explanation of terms connected with electrolysis
292
238. Different modes of passage of the current
292
239. Magnetic action of the current
293
240. The Galvanometer
294
Conduction And Resistance.
241. Ohm's Law
295
242. Generation of heat by the current. Joule's Law
296
243. Analogy between the conduction of electricity and that of heat
297
244. Differences between the two classes of phenomena
297
245. Farady's doctrine of the impossibility of an absolute charge
298
