646 



INDEX. 



Arsenic, a good test for, 173. 



Arteries, twisting of the, 564. 



Atmosphere, tides in the, 559. 



Atmospheric phenomena, described by 

 Professor Strehlke, 432. 



Atomic weight of titanium, 175. 



Ava root, medicinal use of the, 639. 



Aubert, M., on the spontaneous inflam- 

 mation of charcoal, 617. 



Aurora borealis, account of an irised, 

 198. 



by Mr. Christie, 262. 



influence of, on the 



magnetic needle, 429. 



account of, by Dr. 



Moll, 519. 

 observations upon the, 



by the Hon. C. Harris, 522. 



by M. Arago, 558. 



height of the luminous 



arch above the earth's surface, 525. 



B. 



BAKER'S account of the wheel animalcula, 

 221 remarks on the apparent circu- 

 lar motion, 222. 



Barometer, improved mountain, 555. 



new construction of a, 601. 



Battery for electro-magnetic purposes, 



remarks upon the construction of a. 



35. 



Becquerel's error in estimating the con- 

 ducting power of wires, 36. 

 , *rr on the electrical state of bodies 



by the action of heat, 568. 

 Bees, account of Mexican domestic, 640. 

 Beltrami's, M., account of a two-headed 



lizard, 570. 

 Bennati, on the mechanism of the human 



voice, 185. 

 i on the affections of the vocal 



organs, 565. 

 Berzelius's remarks upon para-tartaric 



acid, 395. 

 . method of preparing urea, 



401. 

 on the combination of chloride 



of gold, with chloride of potassium 



and sodium, 409. 



test of the protoxide and per- 

 oxide of iron, 624. 

 Bevan, on the compression of lead, 



157. 



.. . on the power of horses, 159. 

 Bi-carbonate of soda, mode of preparing, 



385. 

 Bicheno, Mr., on the plant intended by 



the shamrock of Ireland, 453. 

 Biot, M., on remarks upon his theory of 



rainbow, 282. 



i his calculation of the com- 



mencement of the Egyptian year, 

 473. 

 Birds, peculiar cleanliness of, 25. 



of prey, on the vision of, 192. 



their care to secure warmth, 505. 



Bismuth, crystallization of, 393. 



and its alloys, expansion of, 



during congelation, 411, 

 Blood, mode of preserving, 398. 



presence of manganese in, 399. 



Bodies, change of volume in, when they 



combine together, 160. 

 Bonijol's apparatus for decomposing 



water by atmospheric electricity, 376. 

 for decomposing potash, ibid. 



Botany of India, by Dr. Wallich, ana- 

 lysis of the, 360. 



Bonnycastle's, Captain, observations on 

 the phosphorescence of the sea, 194. 



Boullay, M., on the change of volume 

 in bodies when they combine together, 

 160. 



on ulmin, 179. 



Boussingault, M., on ammonia in native 



oxide of iron, 174. 

 Bowdoin's, Mr., account of an irised 



aurora borealis, 198. 

 Braconnet, M., on caseum and milk, 



181. 

 Brande, Mr., on the electro-chemical 



decomposition of the vegeto-alkaline 



salts, 250. 

 . on the relation of the vegeto- 



alkalies to the common alkalies, and 



to certain proximate principles of 



vegetables, 547. 

 Brewster, Dr., on the laws of elliptic 



polarization, as exhibited in the action 



of metals upon light, 340. 

 Bromic and chloric acids, action of 



alcohol upon, 615. 

 Bromide of carbon, mode of preparing, 



Brongniart, on the smut in corn, 420. 

 on the structure of leaves, 



421, 636. 



Brown's, Lieutenant, experiments on 

 the stiffness and strength of timber, 

 599. 



Browne's moving molecules, easy mode 

 of exhibiting, 369. 



Bullet, mode of preventing its discharge 

 from a gun, by the finger, 368. 



Burnett, Mr., on the development of the 

 several organic systems of vegetables, 

 83 remarks upon the functions of 

 plants, 84 analysis of a plant, 87 

 remarks on the death of trees, when 

 the roots are too thickly covered with 

 earth, 89 observations on the motion 

 of the sap in plants, 90 changes 



