Page:A Treatise on Electricity and Magnetism - Volume 1.djvu/29

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Art. 194. Application to two cases of the flow of electricity in a conducting sheet

195. Application to two cases of electrical induction

196. Capacity of a condenser consisting of a circular disk between two infinite planes

197. Case of a series of equidistant planes cut off by a plane at right angles to them

198. Case of a furrowed surface

199. Case of a single straight groove

200. Modification of the results when the groove is circular

201. Application to Sir W. Thomson's guard-ring

202. Case of two parallel plates cut off by a perpendicular plane. (Fig. XII)

203. Case of a grating of parallel wires. (Fig. XIII)

204. Case of a single electrified wire transformed into that of the grating

205. The grating used as a shield to protect a body from electrical influence

206. Method of approximation applied to the case of the grating  Chapter XIII. Electrostatic Instruments. 207. The frictional electrical machine

208. The electrophorus of Volta

209. Production of electrification by mechanical work.—Nicholson's Revolving Doubler

210. Principle of Varley's and Thomson's electrical machines

211. Thomson's water-dropping machine

212. Holtz's electrical machine

213. Theory of regenerators applied to electrical machines

214. On electrometers and electroscopes. Indicating instruments and null methods. Difference between registration and measurement

215. Coulomb's Torsion Balance for measuring charges

216. Electrometers for measuring potentials. Snow Harris's and Thomson's

217. Principle of the guard-ring. Thomson's Absolute Electrometer

218. Heterostatic method

219. Self-acting electrometers.—Thomson's Quadrant Electrometer

220. Measurement of the electric potential of a small body

221. Measurement of the potential at a point in the air