768 
I N 1> E X. 
Magnetic declination, inclination and intensity, mean diurnal variation of, at the Cape of Good 
Hope, 117, 118. At St. Helena, 119, 120. At Singapore, 121, 122. 
Magnetic declination, annual variation of, at different periods of the day, 635. 
Magnetic disturbances, periodical laws discoverable in the mean effects of, 123. 
Magnetic force, general distribution of, 53. 
Magnetic Survey of the Eastern Archipelago, 287. 
Magnetic variation, diurnal, 56. Annual, 73. Local, 98 et seq. 
Magnetism, atmospheric, 43-85. 
Magnetism, on a mathematical theory of, 243-269. Part I. On magnets and the mutual force 
between magnets, 244. On the laws of magnetic force and the distribution of magnetism 
in magnetized matter, 248. On the imaginary magnetic matter, by means of which the 
polarity of a magnetized body may be represented, 250. Determination of the mutual actions 
between any given portions of magnetized matter, 257. On the solenoidal and lamellar 
distributions of magnetism, 269. 
Mathematical theory of magnetism. Part I., 243, 269. 
Megatherium, osteology of, 719. 
Memhrana tympani, on the structure of, 159—167. 
Methyl, action of ammonia upon iodide of, 381. 
Methylodiethylamylammonium, action of heat upon oxide of, 377. 
Miller (J. F., Esq., F.R.S.). On the relation of the Air and Evaporation Temperatures to the 
Temperature of the Dew-point, as determined by Mr. Glaisher’s Hygrometrical Tables, 
founded on the Factors deduced from the six-hourly observations made at the Royal Obser- 
vatory, Greenwich, 141. 
^ . On the Meteorology of the Lake District, with a continuation of 
the results of Experiments on the Fall of Rain at various heights, up to 3166 feet above the 
sea-level, 149. 
. On the Meteorology of the Lake District of Cumberland and 
Westmoreland, including the results of Experiments on the Fall of Rain at various heights, 
up to 3166 feet above the sea-level. Fourth paper for 1850, 623. 
Molecular constitution of organic bases, 257. 
Moon, age of, with relation to the direction of the wind, 411. 
Moseley (The Rev. H., F.R.S.). On the Rolling Motion of a Cylinder, 549. 
N. 
Nerve-vesicles of the spinal chord, 614. 
Nerves, spinal, origin of, 616. 
Nerve-tubes of the spinal chord, 618. 
Newport (George, F.R.S.). On the Impregnation of the Ovum in the Amphibia. First Series, 
169. 
Nitric acid in rain-water, 409. 
Nitric acid, on the action of, on various vegetables, 413. Populus halsamifera, ibid. Nitro- 
populic acid, 414. Nitropopulate of potash, 417 ; of silver, 418 ; of soda, ibid. ; of baryta, 
419; of lead, Populus nigra, Mvd. Acids resembling nitropopulic, 421. Salix Rus- 
selliana, ibid. Spartium seoparium, 422. Scopai’ine, ibid. Sparteine, 425. Nitropicrate 
of, 426. Chloride of platinum and sparteine, 427. Double chloride of mercury and spar- 
