Rotation, (magnetic) experiments on, 385, 386 Rust, preservative against, 396 Sabine, (Capt. Edward) analysis of his work on experiments to Salisbury. See Moveable Rocks Salt on the shore of the Severn, notice of, 201 Scrope, (G. Poulett, Esq.) considerations of, on volcanoes, 356- 374 Selenium, found in the sulphur of the Lipari Islands, 174, 175 Severn, geology of the river, 413, 414 notice of salt, found on the shores of the river, 201 Solanum pseudo-quinia, chemical examination of, 181, 182 South, (James, Esq.) examination by, of the large achromatic of 299 Spohn's, (Professor) remarks on his essay, De LINGUA et LITERIS Stars, observations on the apparent distance and positions of Steel, explanation of the cutting of, by iron, 383-385 and iron, observations on the solution of, in acids, and on Sulphur, of the Lipari Islands, existence of selenium in, 174, 175 Swainson, (William, Esq.) monograph by, of the genus Tachypho- Tachyphonus, a monograph of the genus, 60-69 Thomson, (Dr. Thomas) attempt of, to establish the first prin- alkaline earths, 135-137; on the atomic weights of the vege- 141 Thorina, compound nature of, demonstrated, 391 Titanic acid, separation of, from the oxide of iron, 176, 177 Torricellian tube, on the alteration in the bulk of successive por- Transits of Venus, method of computing the sun's horizontal pa- Tyrant Shrikes of America, observations on, 267-285 Tungsten, notice of, experiments on its combinations, 177-180 Water, globules of, found in amethyst, 187; action of, upon White, (John, Esq.) experiments and observations on calcareous Wohler, (M.) experiments of on tungsten, 177-180 Urines, peculiar blue matter obtained from certain, 409-411 Variolus eruption, employment of caustic for the destruction of, 200 Volcanoes, considerations on, 356-374 Voltaic piles, (dry) notice of, 169, 170 Yew tree at Peronne, notice of the age of, 412 Zamboni, (M.) on a dry voltaic pile, 169, 170 |