Rotation, (magnetic) experiments on, 385, 386
Royal Society, proceedings of, 296-307

Rust, preservative against, 396

Sabine, (Capt. Edward) analysis of his work on experiments to
determine the figure of the earth by means of the pendulum,
vibrating seconds in different latitudes, and on various other
subjects of philosophical inquiry, 141-159

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
Sepia, experiments on the black principle of, 181

Severn, geology of the river, 413, 414

notice of salt, found on the shores of the river, 201
Shooting stars, seen in the day-time, on the nature of, 168
Smoky chimneys, method of curing, 376

Solanum pseudo-quinia, chemical examination of, 181, 182
Solar eclipses and occultations of the planets by the moon, in the
year 1826; elements for computing, 327, 328

South, (James, Esq.) examination by, of the large achromatic of
the Royal Observatory at Paris, 286-288; on the apparent
distance and position of 460 double and triple stars, 297-

299

Spohn's, (Professor) remarks on his essay, De LINGUA et LITERIS
VETERUM EGYPTIORUM, edited by Professor Seyffarth, 4to.,
Leipzig, 1825, 159, 160

Stars, observations on the apparent distance and positions of
460 double and triple, 297-299

Steel, explanation of the cutting of, by iron, 383-385

and iron, observations on the solution of, in acids, and on
the residua which remain, 395, 396

Sulphur, of the Lipari Islands, existence of selenium in, 174, 175
-Sulphuric acid, hygrometric property of, 400

Swainson, (William, Esq.) monograph by, of the genus Tachypho-
nus, a group of birds belonging to the Tanagra of Linnæus,
60-69; observations by, on the Tyrant Shrikes of America,
267-285

Tachyphonus, a monograph of the genus, 60-69

Thomson, (Dr. Thomas) attempt of, to establish the first prin-
ciples of chemistry by experiment,-analysis of his work, 113;
remarks on his historical introduction, 117; on the specific
gravities of oxygen and hydrogen gases, and his mode of expe-
rimenting, 121-129; remarks on his experiments on the atomic
weights and specific gravities of chlorine and iodine, 130-132;
his tables of nitric acid, ibid.; experiments on the atomic weights
of the acidifiable combustibles, 133, 134; of the alkalis and

alkaline earths, 135-137; on the atomic weights of the vege-
table acids, ibid., 139; remarks on the style of his writing, 139-

141

Thorina, compound nature of, demonstrated, 391

Titanic acid, separation of, from the oxide of iron, 176, 177
Titanium, (metallic) found in iron furnaces, 176

Torricellian tube, on the alteration in the bulk of successive por-
tions of air introduced into, 375, 379

Transits of Venus, method of computing the sun's horizontal pa-
rallax from, observations of the, 94-98

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
glass, 259-264; use of, in formation of lead plaster, 400, 401
Weights and measures, account of the construction and adjustment
of the new standard of, 299-303

White, (John, Esq.) experiments and observations on calcareous
cements, 50-57

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
Vauquelin, (M.) examination of the solanum pseudo-quinia, 181, 182
Vegetable kingdom, action of poisons on the, 191-196

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