547 
INDEX to VOL. XXI. 
ACETYLENE, researches on, 358. 
Alcohols, polyglyceric, on the, 499. 
Allylene, on the formation and con- 
stitution of, 359. 
Ammonia, on the specific gravity of 
liquid, 364. 
Ampére’s experiment on the repulsion 
of a rectilinear electrical current on 
itself, on, 81, 247, 319. 
Antozone, on the insulation of, 88. 
Arsenic, on the presence of, in the 
beds of rivers, 318. 
Atkinson’s (Dr. E.) chemical notices 
from foreign journals, 120, 292, 
309, 495. 
Atmosphere, solar, on the chemical 
analysis of the, 185. 
Balance-galvanometer, on some re- 
sults im electro-magnetism obtained 
with the, 311. 
Barometers, on the temperature cor- 
rection of siphon-, 206. 
Battery, on a constant copper-carbon, 
80 
Beilstein (M.) on chlorobenzole, 299 ; 
on saligenine, 363. 
Benzole series, observations on the, 
176. | 
Bernoulli (M.) on tungsten and its 
alloys, 292. 
Blair (G.) on some results in electro- 
magnetism, 311. 
Bodies, on the cubical compressibility 
of certain, 447. 
Boiling-point and composition, on the 
relation between, in organic com- 
pounds, 227. 
Books, new :—Todhunter’s History 
of the Progress of the Calculus of 
Variations, 520. 
Brewster (Sir D.) on certain aifections 
of the retina, 20, 
Brodie (Rev. P. B.) on the distribu- 
tion of the corals in the lias, 237. 
Broun (J. A.) on the lunar-diurnal 
variation of magnetic declination at 
the magnetic equator, 384. 
Butlerow (M.) on the action of am- 
- ee gas on dioxymethylene, 
Butyryle, observations on, 501. 
Calcium spectrum, on the, 239. 
Calorimeter, on the construction of a 
new, 462. 
Cambridge Philosophical Society, 
proceedings of the, 469. 
Campbell (D.) on the presence of 
arsenic and antimony in the beds 
of rivers, 318. 
Cannizaro(M. )onhomoanisic acid,360 
Caoutchine, on the properties and 
composition of, 463. 
Capillary attraction, on peculiar forms 
of, 254. 
infiltration through porousrocks, 
researches on, 479. 
Carbonic acid, on a new method of 
obtaining solid, 495. 
Carl (Dr.) on the galvanic polariza- 
tion of buried metal plates, 377. 
Carré (M.) on the production of low 
temperatures, 296. 
Cayley (A.) on the theory of deter- 
minants, 180; on equations cf the 
fifth order, 210, 257; on the parti- 
tions of a close, 424; ona surface 
of the fourth order, 491. 
Challis (Prof.) on a theory of mag- 
netic force, 65, 92, 250; on the 
planet within the orbit of Mercury, 
discovered by M. Lescarbault, 470; 
on theoretical physics, 504. 
Chapman (Prof. E. J.) on the drift- 
deposits of Western Canada, 428, 
