r N D EX. 
769 
teine, 428. Bichloride of platinum and sparteine, 429. Double mercurial chloride of spar- 
teine, ihid. Properties of sparteine and of scoparine, 430. 
Nitrogen, magnetic condition of, 45. 
Nitropopulic acid, 414. 
O. 
Oceanic and Channel streams, mixed tides, 704. 
Organic bases, on the molecular constitution of, 257. 
Ovum, on the impregnation of, in the Amphibia, 169. Changes of, within the body, 172. Changes 
after spawning and impregnation, 183. Susceptibility of the ovum, 191. On the agency of 
spermatozoa in impregnation, 203. Nature of that agency, 212. How affected by chemical 
media 224 — and by mechanical media, 234. 
Owen (Professor). On the Megatherium [Megatherium Americanum, Blumenbach), 719. Part I. 
Preliminary observations on the Exogenous Processes of Vertebrae, 719. 
Oxygen, magnetic characters of, 20. Magnetic condition of, 47. 
P. 
Parallax, observations on stars favourably situated for the investigation of, 333. 
Potash and soda, comparative observations on the diffusion of solutions of their salts, 483. 
Processes, exogenous, of vertebrae, 719. 
Pyrosoma, on the anatomy of, 580. 
R. 
Rain, on the fall of, in the Lake District, 149. 
Rain, on the fall of, at various heights in the Lake District of Cumberland and Westmoreland, 
623. 
Rubian and its products of decomposition, 433. Properties of, 440. Composition of, 442. Action 
of sulphuric and muriatic acid on, 444. Alizarine, 447. Verantine, 449. Rubiretine, 453. 
Rubianine, 454. Sugar, 456. 
Rubianine, one of the products of decomposition of rubian, 454. 
Rubiretine, one of the products of decomposition of rubian, 453. 
S. 
Sabine (Lieut.-Col. R.A.). On Periodical laws discoverable in the mean effects of the larger 
Magnetic Disturbances, 123. 
. On the Annual Variation of the Magnetic Declination, at different 
periods of the day, 635. 
Salpa and Pyrosoma, on the anatomy and physiology of, 567. The structure of Salpa, 568. 
The anatomy of Pyrosoma, 580. The homology of structure of Salpa and Pyrosoma, and 
of these with the ordinary Ascidians, 585. History of the knowledge of Salpas, 589. 
Scales and Bones of Fishes, on the structure and development of, 643. 
