126 INDEX. 



Magendte (M), on some recent discoveries relative to the nervous 

 system, xvii. 143 



experiments of, on feeding dogs with bread, xix. 172 



Magnesia, bad effects of the incautious use of, i. 297 



fusion of, with the blowpipe, ii. 109 



-iA* — on its separation from lime, by means of a neutral car- 

 bonate of potash, iii. 216. vi. 313. ix. 177 



— lampate of, vi. 322. vii. 392 



i native carbonate of, viii. 171 



. solubility of, xii. 407 



experiments on the sulphate of, ix. 407 



test for, xiv. 229 



geological notice of, xix. 83 



Magnesium (sulphuret of), experiments on, xv. 149 

 Magnetic force, observations on, v. 212 



and its connexion with electrical phenomena, x. 36 1 



• — attraction, experiments on the law of, xii. 335 



— needle, recession of, ix. 425. xiv. 220. Dip of, 161. 



Deflection of, by the electric current, xx. 400 

 Magnetism produced by the violet rays, experiments on, iii. 406 

 ' applied as a test of iron, v. 136. Morrichni's ex- 

 periment repeated by Mr. Playfair, 138 

 phenomena of, vi. 73. Communicable from one body 



to^another, 77. Artificial magnets, ib. Horseshoe magnets, 79, 

 Process, for forming, 82. Invention and uses of the dipping 

 needle, 84. Of the compass, 87. Table of magnetic variation, 

 remarks thereon, and hypothesis to account for it, 89. Obser- 

 vations on the decline of the magnetic needle, 169. Terres- 

 trial, 371 



- by light, vii. 398. Encouraged in Prussia, and ex- 



ploded in Austria, 402 



effects of the sun's rays on, viii. 383 



impressed on metals, by electricity in motion, xi. 281. 



The force of, compared with the dip, 374 



■ observations on some new electro-magnetical motions. 



and on the theory of, xii. 74. Phenomena produced by electricity, 

 126. Production of, 414. Electro-magnetic rotation, 415 



