Royal George, state of preservation of, xl, 213. ---- Society, see _Society_. Rubellite of Kingsbridge, ii, 366. Ruby, fusion of, ii, 292. Rudder, temporary, xiii, 371.^f _Rue, W. de la_, structure of electro-precipitated metals, xlix, 390. _Ruffin, E._, on calcareous manures, review of, xxx, 138. _Ruggles, D._, notice of the region about Fort Winnebago, xxx, 1.^f ----, on the copper mines of Lake Superior, xlix, 64.^f ----, tides in the North American lakes, xlv, 18. ----, on a large trilobite, and Iowa coralline marble, xlix, 216. Rumford, Count, biographical memoir of, xix, 28. ----, ----, sketch of the early history of, _J. Johnston_, xxxiii, 21. Ruminants, follicular dentition in, xxxviii, 129. _Rumker, C._, on currents in the ocean, xx, 180. Rupert's drop, breaking of, xxv, 194. Rural economy, v, 380; xiv, 391. _Ruschenberger, W. S. W._, remarks on the barometer, and meteorological observations on board U. S. ship Peacock, xxxiii, 345. ----, translation of _C. Bertero's_ list of the plants of Chili, xix, 63, 299; xx, 248; xxiii, 78, 250. _Rush, B._, on the sugar of the maple, ii, 261. _Russell, A._, on Statistical Enquiries, noticed, xxxix, 395. _Russell, J. L._, on the cryptogamia of Chelmsford, xxxix, 183. _Russell, J. S._, on waves, xxxiii, 283; xxxiv, 1; xxxv, 290. ----, substitute for mountain barometer, xxxv, 294. _Russell's_ Planetarium, xlii, 400. Russia, population of, iv, 389. ----, population and religion of, xv, 397. ----, religious toleration in, xvii, 192. ----, establishments in, v, 176. ----, extensive draining in, v, 393. ----, destruction of live-stock by wolves, xx, 177. ----, wood in, vi, 398. ----, steppes of, xvii, 23. ----, ----, salt, of Orenburg, xliv, 205. ----, Irkutsk, notice of, xvii, 27. ----, Okotsk, notice of, xvii, 30. ----, St. Petersburgh Botanic Garden, xx, 175. ----, libraries of, v, 177. ----, Yakutsk, notice of, xvii, 28. ----, gypsum in, xvii, 19, 21, 24. ----, salt of, xvii, 19. ----, mines, proceeds of, from 1818 to 1823, xii, 197. ----, mines of Nertchinsk, xvii, 34. ----, diamond mines, xix, 199. ----, copper mines at Ekatherinenburg, xvii, 25. ----, notice of gold mines of, ix, 183; xii, 384; xiv, 204; xvii, 25; xviii, 190; xxviii, 395; xlvi, 211. ----, mines of gold and silver, yield of, xvii, 406; xx, 402; xxi, 372. ----, mass of twenty-five pounds, xii, 384. ----, platina in the Ural, xii, 384; xiv, 204; xviii, 190; xxviii, 395. ----, ----, large masses of, xlvi, 212. ----, iron founderies, improvements in, xxx, 181. ----, stone butter, a mineral product eaten in, xvii, 28. Russian drinks, xi, 392. ----, leather, fabrication of, iv, 193. ----, universities, xx, 176. Rust, preservation of iron from, xix, 203; xxi, 150; xxii, 382; xxiii, 199, 383. ----, means of preserving from, by caoutchouc, vi, 398. Ruthenium, a new metal from the Ural, xvi, 384; xlviii, 401.