606 
INDEX. 
Photography, on the solar spectrum and, 
239. 
Photometry in connexion with physical 
optics, 16. 
Physiology of cells, a contribution to the, 
526. 
Piccolomini (Comte Vincent) letter to Sir 
J. W. Herschel, Bt., on the geogra- 
phical position of the Californias and of 
the Mexican coasts of the Pacific, 
596. 
Piria (R,) on the combinations of sali- 
cyle, 210. 
Plants, germination and the growth of, 
271. 
Pleiades, a catalogue of twenty-seven 
stars of the, 150. 
Poggendorff (Prof.) on galvanic circuits 
composed of two fluids, and of two me- 
tals not in contact, 485. 
Polychromatic acid, 154. 
Port Arthur, meteorological register kept 
at, 600. 
Postage, new system of, 78. 
Potash, chlorate of, manufacture of, 237. 
Potassium, ferrocyanide of, on a new 
compound of, with cyanide of mercury, 
128; action of the air on salicide of, 
217; iodide of, on a pseudomorphous 
variety of, 222. 
Potter (R.) on Photometry in connexion 
with physical optics, 16 ; letter from, to 
Mr. R. Taylor, 220 ; on interferences, 
as an experimentum crucis as to the na- 
ture of light, 380. 
Pratt (J. H.) on the temperature of the 
sea and air, and other phaenomena, du- 
ring a voyage to India, 176 ; table of 
results on the temperature of the sea, 
177. 
Problem of the knight’s move at chess, on 
the, 306, 498. 
Pseudomorphous variety of iodide of po- 
tassium, 222. 
Pyrites, on the products of oxidized, 265 ; 
natural products which originate from 
the action of the atmophere on iron, 265. 
Radicals, simple electro-positive, 4 ; sim- 
ple electro-negative, 4; compound, 5; 
ori oxichlorides with compound, 7. 
Rays, chemical, on the permeability of va- 
rious bodies to the, 138. 
Reade (Rev. J. B.) on single achromatic 
eye pieces, and their superiority to the 
double eye piece of Huyghens, 595. 
Refractions, astronomical, theory of 89, 
434. 
Roberts (Martyn J.) on an anomalous 
electric condition of iron, 142; results 
arrived at, by battery of copper and 
zinc, 143. 
Rocks near Killarney and Dublin, on the 
order of succession of the older strati- 
fied, 163. 
Roget (Dr.) on the problem of the 
knight’s move at chess, 306, 498. 
Roxburgh, on ashes which fell on board 
the, 144. 
Royal Astronomical Society, proceedings 
of the, 72, 144. 
Royal Institution, meetings at the, 338, 
447. 
Royal Irish Academy, proceedings of the, 
224. 
Royal Society, proceedings of the, 329, 
526, 590. 
Runton, freshwater strata of, 362 ; shells 
discovered at, 363 ; crag at, 365. 
Russia, Norway and Germany, on magne- 
tic observations in, 598. 
Sabine (Major) on magnetic observations 
in Germany, Norway, and Russia, 
598. 
Salicic acid, 214. 
Salicide of potassium, action of the air on, 
217. 
Salicides, metallic, 213. 
Salicin, decomposition of, by sulphuric 
acid, 219; action of chlorine on, 219. 
Salicine, analysis of, 210; crystallized, 21 1 ; 
anhydrous, 211. 
Salicyle, on the combinations of, 210; hy- 
druret of, 212; chloride of, 216; bro- 
mide of, 216 ; combinations of, with 
amidogene, 216. 
Schafhaeutl (Dr. C.) on the combinations 
of carbon with silicon and iron and 
other metals, forming the different spe- 
cies of cast iron, steel, and malleable 
iron, 44, 297, 426, 514, 570. 
Scheerer (Th.) on the decomposition of 
the neutral sulphate of the peroxide of 
iron by boiling its solution, 130; on the 
natural products which originate from 
the action of the atmosphere on iron 
pyrites, 265 ; on two Norwegian cobalt 
ores from the Skutteruder mine, 482. 
Schumacher (Prof.), letter from, to Fran- 
cis Baily, Esq., on the discovery of a 
comet by M. Galle, 151. 
Scientific books, new, 79. 
Scientific Memoirs, answer to a memoir of 
the late Prof. Nobili in the, 52. 
Sea and air, on the temperature of the, 
during a voyage to India, 176. 
Secondary currents, conditions which in- 
fluence the production of, 206. 
Ships of the British navy, effects of light- 
ning on certain, 404. 
Siegen, analysis of iron from, 522. 
Selenium, on a compound of fluorine with, 
194. 
Silicon and iron, on the combinations of 
carbon with, 44, 297, 426. 
