INDEX. 
839 
E. 
Electricity, atmospheric, observations on, in India, 374. 
Electro-Physiological Researches, 287. Conductibility of the Muscles in relation to that of the 
Nerve, 288. Difference of excitability produced in a nerve according to the direction of the 
electric current, 289. Excitability of the nerves in relation to the integrity of the nervous 
system, 290. Analogy between electricity and nervous force, 294. 
. Induced contraction, 645. 
Epping, on the mean monthly temperature at, 572. 
Equations, linear, in finite differences, and linear differential equations, 261. 
Ethyl, Bromide of, its action upon aniline, 98; upon ethylaniline, 103; upon diethylaniline, 106; 
upon chloraniline and upon ethylochloraniline, 108; upon bromaniline, 109; upon nitraniline, 
110; upon amylaniline, 117. 
anew basic compound, 100. Hydrobromate of, 101. Platinum-salt of, Action 
of bromide of ethyl upon, 103. Action of iodide of methyl upon, 114. Action of bromide 
of amyl upon, 117. 
Ethylochloraniline , action of bromide of ethyl upon, 109. 
Exercise, on the effect of, on the temperature of the body, 441. 
Experiments and observations upon the properties of light, 235. 
F. 
Fairbairn (William, Esq.). An Experimental Inquiry into the Strength of Wrought-Iron 
Plates and their Riveted Joints as applied to Ship-building and Vessels exposed to severe 
strains, 677. 
Faraday (Prof. M.). Experimental Researches in Electricity, Twenty-third Series. § 29. On 
the polar or other condition of diamagnetic bodies, 171. 
Fiber zibethicus, on the dental structures of, 550. 
Floating bodies, on the dynamic stability and on the oscillations of, 609. 
Fogs, observations on, in India, 374. 
Forces, on the mutual relations of the vital and physical, 727. 
Fucusamide, 473. 
Fucusine, 474. Nitrate of, 475. Muriate of, 477. Double platinum-salt of, ibid. Oxalate of, ibid. 
Fucusol, 471. 
Furfur amide. Furfurol, 467. 
Furf urine, double chloride of, and platinum, 470. Nitrate of, 476. Opake crystals of, ibid. 
G. 
Gerbillus Shawii, on the dental structures of, 549. 
Glaisher (James, Esq.). Sequel to a paper on the reduction of the Thermometrical Observations 
made at the Apartments of the Royal Society, 569. 
Graham (Prof, Thomas). On the Diffusion of Liquids; 1. 
. Supplementary Observations on the Diffusion of Liquids, 805. 
Gray (Henry, Esq.). On the Development of the Retina and Optic Nerve, and of the Mem- 
branous Labyrinth and Auditory Nerve, 189. 
Greenwich, on the thermometrical observations taken at the Royal Observatory, 569. Compari- 
son of the temperature at, with that at Somerset House, 579. 
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