ROB 
Riddell, J. L., Texas, Trinity coun- 
try, xxxvil, 211. 
——, on Hog Wallow Prairies, 
Texas, xxxix, 211. 
Riench’s test for arsenic, medi- 
colegal application of,  xliv, 
240. 
Rigg, R., carbon a compound bo- 
dy, xlvii, 211. 
——, Chemical and Agricultural 
Researches of, noticed, xlvil, 
211. 
Right angled triangles, expressions 
for sides of, xxiv, 68. 
Rio Janeiro, meteorological register 
kept at, from 18382-1843, xlvii, 
290. 
Ripple-marks in transition rocks, 
T. A. Conrad, xxxv, 248. 
in the rocks of the 
Connecticut valley, C. Lyell, xlv, 
394. 
in the new red sand- 
stone of New Jersey, xliv, 136. 
—— and mud furrows in 
rocks, J. Hall, xlv, 148. 
—— —— in New York, xxxvi, 
46. 
Rise of land, see Elevation. 
Ritter, T., on Belmont anthracite, 
xii, 301. 
Rive, A. de la, galvanic instrument 
by, v, 395. 
, present state (1833) of the 
principles of electricity, xxvi, 
175. 
219 
ROC 
Robinson, E., gold medal of the 
Geographical Society awarded to, 
xliii, 404, 
Robinson, S., catalogue of minerals 
of, noticed, vill, 200; ix, 396. 
, localities of minerals, viii, 
230. 
5 notice of minerals, x, 225. 
, cabinet of minerals of, xiii, 
199. 
Robison, I., on the rising of the 
coast of Chili, in 1822, xxx, 110. 
Robison, J., perfection of the art 
of photography, xxxvii, 183. 
, substitute for barometer,xxxv, 
294, 
, on electro-magnetic currents, 
XXXIV, 6. 
River McKenzie, xvii, 4. 
Rhine, amount of water in, 
which passes Bale, v, 382. 
Mississippi, velocity of, vii, 
174. 
Copper Mine, xvii, 7. 
Rivers, action of, xxi, 23. 
Rivero, de, sketch of the mines of 
Pasco, xvii, 43.f 
Robert, E., visit to Iceland, xxxi, 
167 ; xxxii, 196. 
Robertson, E., on aerostation, xiv, 
166, 325. 
Robiquet, on a new metallic dye, 
ony LUTE 
Rochefoucald, Duc de la, notice of, 
xiii, 167; xiv, 392. 
Rochester, town of, ii, 252. 
Rock crystal, see Quartz. 
Rock, Paint, i, 67. 
Rock, Putnam’s, v, 37. 
Rocks, Brongniart’s seven classes 
of, xxxix, 149. 
, K..C. von Leonhard’s ar- 
rangement of, xx, 182. 
, European, classification of, 
H. T. De la Beche, xviii, 26. 
, American, classification and 
characters of, L. Vanuxem, xvi, 
254, 
, homenclature and classes of, 
A. Eaton, xiv, 145, 359. 
of America, equivalency with 
European, A. Eaton, xxxix, 149. 
, vVoleanic, characters and ar- 
rangement of the different kinds 
of, G.. P. Scrope, xv, 28. 
of the Connecticut valley, vii, 
25. 
, Joints in, a result of elevation, 
Xxxi, 366. 
, Supposed motion, without ap- 
parent cause, v, 34.f 
, moving, of Salisbury, re- 
marks on, v, 34; ix, 239. 
moved by ice, J. Adams, ix, 
136. 
—— ——, J. Wood, ix, 144. 
