Part 31

Rumford roaster, 166.

"Sandford and Merton," influence of, on the negro traffic, 197.

Saturn's rings, Maxwell's essay on, 285.

Sea-water, resistance of, 142.

Seguin's attempt to measure loss of heat in the steam-engine, 323.

Self-induction, effect of, on sudden discharge, 142; of electro-magnet, 268; effect of, in induction coil, 321.

Sensation of heat, cause of, 33.

Seraphic love, Boyle's essay on, 15.

Shaw's, Dr., comments on Boyle, 37.

Snellius's laws of refraction, 1.

Socratic method adopted by Franklin, 44.

Specific inductive capacity, discovered by Cavendish, 139; rediscovered by Faraday, 272.

Spectral colours, mixed by Boyle, 31; mixed by Maxwell, 297.

S.P.G., foundation of the, 30.

Spheroidal waves in Iceland-spar explained by Young, 226.

Stamp Act, 112.

Standards Commission, report of, 232.

Statistical method, Maxwell's, 299.

Steeple struck by lightning at Newbury, 92.

Stereoscope, Maxwell's real-image, 298.

Stokes's, Professor G. G., exhibition of the bright centre in the shadow of a disc, 222.

Suction caused by atmospheric pressure, 29.

Surface-tension, 228; suggested by Segner, 229; Young's investigations on, 229.

Table of results of experiments on Boyle's law, 27.

Tatum's lectures on natural philosophy, 240.

Telephone, Graham Bell's, 319.

Temperature, its nature, 33.

Thermometers first hermetically sealed, 2.