Mason, xl, 407; xliii, 381. ---- Wm. Meade, xxv, 215. ---- Prof. Meyen, xl, 219. ---- J. S. Miller, notice of, xx, 300. ---- S. L. Mitchill, xxvii, 149. ---- F. Mohs, xl, 220. ---- Boissel de Monville, xxiii, 371. ---- John Murray, ii, 355. ---- Næff, xxiii, 370. ---- J. N. Nicollet, xlv, 404; xlvii, 139. ---- H. W. M. Olbers, xxxix, 387. ---- B. Oriani, xxv, 186. ---- T. Ornie, xxiii, 370. ---- T. Pennant, xxxvii, 146. ---- Persoon, xxxii, 215. ---- H. Pestalozzi, xiii, 183. ---- William Phillips, xv, 160. ---- M. A. Pictet, x, 179. ---- S. D. Poisson, xl, 220. ---- J. Priestley, xxiv, 28. ---- J. Prince, xxxi, 201.^f ---- C. S. Rafinesque, xl, 221. ---- Ramond, xv, 177. ---- Reichenback, xv, 177. ---- Abel Remusat, xxiii, 371. ---- James Rennell, xx, 304. ---- Stephen Van Rensselaer, xxxvi, 156. ---- La Rochefoucald-Liancourt, xiii, 167. ---- Rodrigues, v, 193. ---- Count Rumford, xix, 28; xxxiii, 21. ---- Thomas Say, xxvii, 393. ---- Scarpa, xxv, 184. ---- L. D. de Schweinitz, xxvi, 218. ---- Schubert, xv, 177. ---- G. S. Serullas, xxiii, 371. ---- Charles Silvertop, xl, 220. ---- Nathan Smith, xvi, 211. ---- Wm. Smith, xl, 219. ---- Smithson, xx, 306. ---- L. Simond, xxxii, 371. ---- G. Spurzheim, xxiii, 356. ---- Sir John St. Aubyn, xl, 220. ---- M. F. de St. Fond, ii, 352. ---- Edward Thomas, xxii, 380. ---- Sir Benjamin Thomson (Count Rumford), xix, 28; xxxiii, 21. ---- John Trumbull, xlvi, 216. ---- Edward Turner, xxxii, 213. ---- Vaucher, xliii, 215. ---- Benjamin Vaughan, xxix, 395. ---- Vigors, xl, 219. ---- Vogel, xliii, 215. ---- Alexander Volta, xv, 67. ---- Eli Whitney, xxi, 201.^f ---- F. P. Wilmsen, xxii, 380. ---- Wollaston, xvi, 216; xvii, 159. ---- Thomas Young, xxii, 232. ---- F. X. Baron de Zach, xxiv, 194. Observatory, a new Astronomical, at Berne, in Switzerland, vii, 374. ----, letter on, from _Encke_ to _A. D. Bache_, xxxviii, 184. ----, at Cape of Good Hope, xxxviii, 95. ----, near Glasgow, xl, 344. ----, at Geneva, xxiii, 390. ----, at Rome, xliv, 373. ----, at Pulkova, astronomical operations at, xlvii, 88. ----, at St. Petersburg, a new, xxviii, 200. ----, at Havana, xlii, 153. ----, remarks on certain, (Cambridge, Brussels, Calton Hill at Edinburgh,) xxviii, 67, 69. ----, United States, Cambridge, xlv, 224. ----, ----, at Girard College, authorized, xxxviii, 398. ----, ----, in Philadelphia, in Rittenhouse Square, xl, 375. ----, ----, of Hudson, Ohio, Western Reserve College, _E. Loomis_, xxxix, 361. ----, ----, of Yale College, latitude and longitude of, xxxiv, 309. ----, instruments proper for a small, xxxviii, 185. ----, magnetical, at Dublin, xxxiv, 3. ----, ----, establishment of, recommended by the British Association, xxxviii, 108. _O'Brien, L._, on a case of transpiration, xxxix, 400. Obsidian, West Indies, i, 237. ----, used for cutting instruments by the Mexicans, xvi, 161.^f