INDEX. 
335 
heart, 286. Distribution of the aorta, 288. Cerebral arteries, 289. Arterial vessels of the 
abdomen, 291. The portal system of vessels, 293. Structure of the pulmono-branchiae, 295. 
Nutrition of the branchiae, 297. Course of the circulation, ibid. Recapitulation and conclu- 
sion, 298. 
N. 
Nervous and circulatory systems, on the structure, relations, and development of the, and on 
the existence of a complete circulation of the blood in vessels, in Myriapoda and Macrourous 
Arachnida, 243. 
Newport (George, Esq.). On the structure, relations and development of the nervous and cir- 
culatory systems, and on the existence of a complete circulation of the blood in vessels, in 
Myriapoda and Macrourous Arachnida. First series, 243. 
O. 
Oil, oil of turpentine, & c., remarkable property of, to change the exciting power (electric) of 
water, 27. 
Otaheite, tide observations at, 55. 
Ovum, mammiferous, spermatozoa observed within the, 33. 
P, 
Parathermic rays of the solar spectrum, 1. 
Pepys (William Hasledine, Esq.). On the respiration of the leaves of plants, 329. 
Photographic processes, on certain improvements on, 1. 
Polarization, elliptic, of light, by reflexion, observations on certain cases of, 35. 
Powell (The Rev. Baden, M.A.). Observations on certain cases of elliptic polarization of light 
by reflexion, 35. 
R. 
Rheometer, 307. 
Rheomotor, 306. 
Rheoscope, 307. 
Rheostat, 309. 
Rheotome, 307. 
Rheotrope, ibid. 
Ross (Captain James Clark, R.N.). Magnetic observations made by, and officers under his 
command, 145, 173, 175, 177, 193, 217. 
S. 
Sabine (Lieut. -Colonel Edward, R.A.). Contributions to terrestrial magnetism, No. IV., 113. 
Second Series of magnetic determinations, by Captain Sir Edward Belcher, R.N., ibid. 
, No.V. 1. Ob- 
servations within the Antarctic Circle, made on board Her Majesty’s Ships Erebus and 
Terror, in the summer of 1840, 1841, in the expedition under the command of Captain 
James Clark Ross, R.N., 145. 2. Observations between Kerguelen Island and Van Diemen 
Island, made on board Her Majesty’s Ship Erebus, July and August 1840, 173. 
Southampton, on the laws of the tides at, 45. 
Spermatozoa, observed within the mammiferous ovum, 33. 
Steam, on the electricity evolved by the friction of (and water), against other bodies, 17. 
