Lefroy (Captain, R.A.). Magnetic Survey of a considerable portion of the North American 
Continent, 237. 
Light, on the magnetization of, 1. Action of magnets on, ibid. Action of electric currents on, 9. 
Law of action, 11. 
Liver, on the secretory apparatus of the, 473. 
Lymph, corpuscle of the, of vertebrate animals, 80. 
M. 
Magnetic actions, new, 21, 41. 
condition of all matter, ibid. 
metals, 50. 
metals and their compounds, action of magnets on, 41. 
Magnetic Survey of a considerable portion of the North American Continent, 237. 
of the Southern Hemisphere between the meridians of 0° and 125° East, and 
parallels of -20° and -70°, 337. 
Magnetism, Terrestrial, contributions to. No. VII. Containing a Magnetic Survey of a con- 
siderable portion of the North American Continent, 237. (See Index of Contents, No. VII.) 
, contributions to. No. VIII. Containing a Magnetic Survey of the 
Southern Hemisphere between the meridians of 0° and 125° East, and parallels of —20° and 
— 70°, 337. (See Index of Contents, No. VIII.) 
Magnets, action of, on light, 1. On heavy glass, 24. On other substances acting magnetically 
on light, 26. On metals generally, 29. On the magnetic metals and their compounds, 41. 
On air and gases, 50. 
Mammalia, on the mechanism of Respiration in, 510. 
Mantell (Gideon Algernon, Esq., LL.D.). On the fossil remains of the soft parts of Fora- 
minifera, discovered in the Chalk and Flint of the South-East of England, 465. 
Matteucci (Signor Carlo). Electro-Physiological Researches. Fourth Memoir. — The physio- 
logical action of the electric current, 483. 
Metals, magnetic, 50. 
Diamagnetic, ibid. 
Meteorological Observations made on board Her Majesty’s (hired) Bark Pagoda, from January 10 
to June 20, 1845, between —20° and —68° Latitude, and 0° and 120° East Longitude, 433. 
(See Index of Contents, 236*.) 
N. 
Nerve, the great splanchnic, and semilunar ganglion, 214. 
Nerves of the Uterus, on the, 213. 
, the lesser splanchnic, 216. 
of the Bladder, 218. 
of the Vaginal Erectile Tissue, ibid. 
the Haemorrhoidal, ibid. 
of the unimpregnated Uterus, 219. 
of the Gravid Uterus, 220. 
of the Ovary, 221. 
size of the, ibid. 
Nervous ganglia of the Uterus, on the, 211. 
Nitrification, on spontaneous, 137. 
