INDEX. 
M 
Machinery, Mr. Babbage’s account of a mode of expressing its 
action by signs, 250. 
Magnesia, its power of emitting light when violently heated, 331. 
Magnetic influence in the sun’s rays, Mr. Christie on, 219. 
Magnetic Observations at Port Bowen, by Capt. Parry and Lieut. 
Foster, Part IV. p. 73, et seq. 
Rotations, Mr. Babbage on, 494. 
Magnetizing potoer of the solar rays, Mrs. M. Somerville on, 132. 
Mathieu, M., his observations of signals at the observatory at 
Paris, S3. 
Measures and weights, standard, Captain Kater on their adjust- 
ment, 1. 
Mercury, proofs of its perfect fixity at — 20° Fahr. 488. 
Metre , its length in inches of Sir G. Shuckburgh’s scale (39‘ 37079) 
page 1. 
Mont Javoult, observations of rockets fired from, 83. 
Mortality, annual , according to different tables, 284-—law of, ex- 
pressed by a curve, and its equation, 288. 
My a truncata, its method of burrowing, 349. 
N 
Naphthaline, its action on sulphuric acid, 140. 
Nereides, their mode of burrowing in sand explained, 342. 
Nerves, additional proofs of their influence on animal heat, 60. 
of motion and sensation form a circle with the brain and 
voluntary muscles, 163-170. 
Nicollet, M., his observations of rocket signals from the Obser- 
vatory of Paris in 1825. 
O 
Oil ofivine, Mr. Hennell’s experiments on, 240. 
Osler, E. Esq. on burrowing and boring marine animals, 342. 
P 
Pain, insensibility of certain nerves to, 168, 172. 
Parallax of the fixed stars, Mr. Herschel on a new mode of 
detecting it, 266. 
Paris, its longitude from Greenwich determined, 77, 83. 
Parry, Capt. his magnetic and other observations at Port Bowen, 
Part IV. Nos. 3, and 9. 
Pearls. Sir E. Home on their production and formation, 338. 
