INDEX. 



549 



Electro-statics, on the theory of, 463. 



Ellis (It. L.) on the method of least 

 squares, 321, 462. 



Emery, description of, and of the 

 minerals associated with it, 396. 



Equation, on the singular solution 

 of a differential, of the first order 

 between two variables, 232. 



Equations, on impossible, 281 ; on 

 the solution of linear differential, 

 224 ; on the solution of a system of, 

 3/0 ; on the theory of, 493. 



Equisetic, aconitic, and citridic acids, 

 identity of the, 397. 



Esprit (M.) on the action of carbon 

 on metallic solutions, 313. 



Ethamic acid, on, 312. 



Ethyalmin, on a new mode of pre- 

 paring, 312. 



Euclid, on the direct demonstration 

 of the 40th proposition of, 312. 



Eudnophite, analysis of, 236. 



Faraday (M.) on the polar or other 

 condition of diamagnetic bodies, 

 88 ; on the magnetic and diamag- 

 netic condition of gases, 545. 



Ferguson (W.) on the occurrence of 

 chalk flints and greensand fossils 

 in Aberdeenshire, 430. 



Fermat's theorem, on the extension of 

 the principle of, 63. 



Forbes (Prof. J. D.) on a remarkable 

 meteor, 357; on the alleged evi- 

 dence for a physical connexion be- 

 tween stars forming binary or mul- 

 tiple groups, 401. 



Fossils, on the occurrence of green- 

 sand, in Aberdeenshire, 430. 



Frog, on the glossopharyngeal and 

 hypoglossal nerves of the, 65. 



Fucusine, 227. 



Fucusole, properties and composition 

 of, 227. 



Gases, on the magnetic and diamag- 

 netic condition of, 545. 



Geometrical theorem, on a, 289. 



Geometry and geometers, on, 198. 



Glaisher (J.) on the reduction of the 

 thermometrical observations made 

 at the apartments of the Royal So- 

 ciety, 66 ; on the weather during 

 the quarter ending June 30, 1850, 

 129; for the quarter ending Sept. 

 30, 1850, 373. 



Glass, chemical examination of red- 

 coloured Roman, 121. 



Gobley (M.) on the discoloration of 

 silver by boiled eggs, 477- 



Graham (Prof.) on the diffusion of 

 liquids, 181, 254, 341. 



Hare (Dr. R.) on the explosiveness of 

 nitre, 525. 



Hayes (A.) on the explosiveness of 

 nitre, 528. 



Heineken (N. S.) on the electric tele- 

 graph, 470. 



Heintz (M. W.) on the presence of suc- 

 cinic acid in the human body, 473. 



Hennessy (J., jun.) on the direct de- 

 monstration of the 40th proposition 

 of Euclid, 312. 



Hippisley (J.) on some improvements 

 in a speculum grinding and polish- 

 ing machine, 69. 



Hunt (Lieut. E. B.) on the interpre- 

 tation of Mariotte's law, 76. 



Hydrostatic log, on the, 59. 



Hypochlorous acid, remarks on, 476. 



Hyposklerite, analysis of, 237. 



Imaginaries, on bisignal univalent, 

 292. 



Induction, on Aristotle's account of, 

 468. 



Iodine, on the compounds of phospho- 

 rus with, 234 ; on the existence of, 

 in beet-root, 237 ; on the extraction 

 of, from plants and from coal, 317- 



Jones (H. B.) on so-called chylous 

 urine, 302. 



Joule (J. P.) on a remarkable appear- 

 ance of lightning, 127. 



Kirchhoff (G.) on the deduction of 

 Ohm's laws, 463. 



Kirkman (Rev. T. P.) on triads made 

 with fifteen things, 169 ; on bisignal 

 univalent imaginaries, 292. 



Knoblauch (H.) on the magneto-optic 

 properties of crystals, and the rela- 

 tion of magnetism and diamagnetism 

 to molecular arrangement, 1. 



Kyd (J.) on the chemical formula of 

 the nitroprussides, 289. 



Lactic acid and alanin, on the artifi- 

 cial formation of, 308. 



Lagoons of Tuscany, on the, 72. 



Lamy (M.) on the existence of iodine 

 in beet-root, 237. 



Lassaigne (M.) on the copper test for 

 sugar, 314. 



Laurent (M. A.) on the sulphuric and 

 nitric compounds of benzin and 

 naphthaline, 471. 



