Page:Proceedings of the Royal Society of London Vol 4.djvu/518

492 Roccella tinctoria, (xlvchil-weed) chemical examination of, 233, 337.

Roccelline, 233.

Rokevvode (J. G.), notice of the late, 418.

Ross (Capt. J. C), magnetic observations, 220.

J magnetic-term observations taken on board H.M.S. Erebus and Terror, 298.

, magnetic-term observations taken at Kerguelen's Land, 293.

, magnetic-term observations made at Van Diemen's Land, 298.

, hourly magnetic observations taken at Kerguelen's Land, 293.

, hourly magnetic observations taken at Van Diemen's Land, 298.

meteorological observations taken on board H.M.S. Erebus and Terror, 293, 303, 374, 380.

notices of the Aurora Australis in Mar. 1841, 395.

Rotatory motion, on, 66.

Royal Medals, the grant of the, con- tinued by Her Majesty Queen Vic- toria, 69, 87.

, alterations in the laws for the distribution of, 88.

—, awarded to the Rev. William Whewell, 6, 24; to H. F. Talbot, Esq., 101 ; to Prof. Thomas Graham, 102; to Sir J. F. W. Herschel, 255 ; to Prof. Wheatstone, 255 ; to Ro- bert Kane, M.D., 337; to Eaton Hodgkinson, Esq., 338; to W. Bowman, Esq., 422 ; to Prof. I)a- niell, 422.

Royal Observatory, Greenwich, on the meteorological instruments at, 330.

Rumford Medal, awarded to Professor Forbes, 104 ; toMr. Fox Talbot, 422.

Rutherford (W.), computation of the ratio of the diameter of a circle to its gircumference to 208 places of decimals, 302.

Sabine (Joseph), notice of the late,15.

Sabine (Lieut.-Col.) on magnetical ob- servations in Germany, Norway, and Russia, 197.

, contributions to terrestrial mag- netism, 212, 221, 287, 369, 465, 468.

, remarks on the meteorological observations made at Alten, 229.

Sagapenum, resin of, 241.

Saint Helena, meteorological observa- tions made at, 295.

Salts, Prof. Graham's inquiries re- specting the constitution of, 102.

Salts of magnesia, zinc, copper, lime, strontia, baryta, lead, silver, soda, ammonia and potass, their action on the blood, 285.

Sandarach, resin of, 163.

Sap, on the cause of the ascent and continued motion of, 432.

on the descent of, in plants, 449.

Sarcolemna, or tunic of the primitive fasciculus of voluntary muscle, 245.

Saunders (G.), notice of the late, 178.

Saurians, remains of, discovered in the strata of Tilgate Forest, 290.

Savart (F.), biographical notice of, 352.

Scammony, resin of, 218.

Schoenbein (Prof.) on the odour ac- companying electricity, 226.

Scilly Islands, shock of an earthquake in the island of St. Mary's, 122.

Sea's surface, laws of the rise and fall of, during each tide, 242.

Secondary compounds, electrolysis of, 153, 231.

Seppings (Sir R.), notice of the late, 263.

Shell, percussion, to explode at the bottom of the sea, 248.

Shells, microscopic examination of the texture of, 435.

, on the combinations of the com- ponent elements of, 467.

', turbinated and discoid, geome- trical forms of, 79.

Shell-lac, specific inductive capacity of, 40, 100.

Ship's compass, on the deviation of, in iron-built ships, 141.

, iron-built, experiments for dis- covering a correction for the devia- tion of the compass in, 141,

Shooting stars, account of those of 1095 and 1243, 210.

Silica, on its solubility by steam, 232.

Silver, Pcua, experiments on, 119.

, the equivalent number of, 123.

, on the reduction of, 447.

Simla, magnetic and meteorological observations made at, 362,371, 383.

Singapore, tidal observations at, 311.

— —, magnetic-term observations made at the observatory at, 371.

, graphic representations of the term-day observations, 371.