472 
Coal, on the occurrence of, in the 
chalk of Kent, 518. 
Cockle (J.) on the theory of equations 
of the fifth degree, 197, 331. 
Colour-blindness, remarks on, 148. 
Cooke (Prof. J. P.) on the possible 
variationof constitution in a mineral 
species independent of the phzeno- 
mena of isomorphism, 405. 
Corvisart (M.) on the action of light 
upon amylaceous substances, 281. 
Crystallographic notices, 325. 
Crystals, on the measure of the dihe- 
dral angles of, 328. 
Cyaphenine, on the preparation and 
composition of, 283. 
Davy (Dr. E. W.) on a simple and 
expeditious method of estimating 
phosphoric acid, 181. 
Davy (Dr. J.) on the electrical con- 
dition of the egg of the common 
fowl, 55. 
Dawson (Dr. J. W.) on some fossils 
from the coal-formation of Nova 
Scotia, 159. 
Debray (M.) on the production of na- 
tive phosphates and arseniates, 380. 
Demidoffite, on the composition of, 
14. 
Deville (M.) on the specific gravities 
of certain yapours at high tempe- 
ratures, 207. 
Diabetes, on lesions of the nervous 
system producing, 52. 
Dispersion, chromatic, on certain laws 
of, 165, 263, 364. 
Dobell (Dr. H.) on the influence of 
light on the growth of animals, 458. 
Donkin (Prof.) on the theory of the 
attraction of solids, 397. 
Dufour (C.) on the scintillation of the 
stars, 216. 
Earnshaw (Rev. S.) on the velocity of 
sound, 449. 
Earth, on the thickness of the crust 
of the, 274, 343, 444. 
Egg, on the electrical condition of 
the, 55. 
Eisenstiick (M.) on a rock oil obtained 
from some lias shales near Ha- 
nover, 389. 
Eissfeldt (M.) on pyrocatechine, 51. 
Electric current, on a new kind of, 45. 
—— deportment of the flame of alco- 
hol, on the, 9. 
light, on the, 320. 
INDEX. 
Electrical conductivity, researches on, 
14. 
discharge iz vacuo, experiments 
on the, 59; on the influence of 
magnetic force on the, 238. 
Electrode, on the behaviour of mer- 
cury as an, ]29. 
Ellis (A. J.) on the systematization of 
mathematics, 224. 
Equation, on the proposition that 
every, has a root, 46. 
Equations of the fifth degree, on the 
theory of, 197, 272, 331. 
Ericinone, on the preparation and pro- 
perties of, 51. 
Espenschied (M.)‘on nitride of sele- 
nium, 277. 
Ethylamine, on new derivatives of, 
232. 
Ethylene, on some combinations of 
the oxide of, with ammonia, 125; 
on the action of, on chloride of sul- 
phur, 388. 
Evaporation, on spontaneous, 314. 
Faraday (Prof.) on lighthouse illumi- 
nation, 320. 
Fittig (M.) on several processes of 
decomposition of acetone, 116. 
Fizeau (H.) on the effect of the mo- 
tion of a body upon the velocity 
with which it is traversed by light, 
245. 
Flames, on the composition of the 
gas in non-luminous, 121. 
Forces, on the correlation of, 133, 
243. 
Fossils, descriptions of new, 159. 
Foucault (M.) on the simultaneous 
emission and absorption of rays of 
the same refrangibility, 193. 
Fraunhofer’s lines, observations on, 
193. 
Fraxetine, on the constitution of, 49. 
Gases, on the dynamical theory of, 
19, 434. 
Gassiot (J. P.) on the electrical dis- 
charge in vacuo, 59. 
Geikie (A.) on the old red sandstone 
of the south of Scotland, 237. 
Geological Society, proceedings of 
the, 75, 158, 235, 318, 399, 467. 
Geuther (A.) on the behaviour of the 
aldehydes with acids, 309. 
Geyger (M.) on the constitution of 
athamantine, 5]. 
Gilm (Von) on chinovie acid, 50. 
