The Croonian Lecture. On the Relations between Muscular Irri- 

 tability, Cadaveric Rigidity, and Putrefaction. By Dr. E. Brown- 

 Sdquard, F.R.S 204 



On the Elimination of Urea and Urinary Water, in their relation to 

 the Period of the Day, Season, Exertion, Food, and other influences 

 acting on the Cycle of the Year. By Edward Smith, M.D., F.R.S. 214 



On the Theory of the Polyhedra. By the Rev. T. P. Kirkman, M. A., 

 F.R.S 218 



Annual Meeting for the Election of Fellows , 233 



Notice of Recent Scientific Researches carried on Abroad. By the 

 Foreign Secretary 233 



Determination of the Optical Constants of Crystallized Substances. 

 (First and Second Series.) By Albert Schrauf (Vienna) 235 



Liquid Diffusion applied to Analysis. By Thomas Graham, Esq., 

 V.P.R.S. .. . I !...:. 248 



On some New Phenomena of Residuary Charge, and the Law of Ex- 

 ploding Distance of Electrical Accumulation on Coated Glass. 

 By Sir W. Snow Harris, F.R.S , 247 



On the Bromide of Carbon. By Arthur C. W. Lennox, Esq. 257 



On the Action of Dibromide of Ethylene on Pyridine. By John 

 Davidson,Esq 261 



On a New Class of Organic Bases, in which Nitrogen is substituted 

 for Hydrogen. By Peter Griess, Esq. 263 



Reproduction of Non-Nitrogenous Acids from Amidic Acids. By 

 Peter Griess, Esq. . , . , 266 



On the Ureas of the Diamines. By J. Volhard, Esq 268 



Notes of Researches on the Poly- Ammonias. No. XT. Isomerism 

 of Diatomic Compounds. By A. W. Hofrnann, LL.D., F.R.S. . . 271 



Notes of Researches on the Poly- Ammonias. No. XH. Action of 

 Cyanate of Ethyl on Urea. By A. W. Hofmann, LL.D., F.RS. . . 273 



Notes of Researches on the Poly- Ammonias. No. XIH. Derivatives 

 of the Phenyl Series. By A. W. Hofmann, LL.D., F.R.S 275 



Notes of Researches on the Poly- Ammonias. No. XIV. Diagnosis of 

 Diamines. By A. W. Hofmann, LL.D., F.R.S 278 



Notes of Researches on the Poly-Ammonias. No. XV. Monacid 

 Polyamines. By A. W. Hofmann, LL.D., F.R.S , . 281 



Researches on the Phosphorus-Bases. No. XIH. Sulphuretted Deri- 

 vatives of Triethylphosphine. By A. W. Hofmann, LL.D., F.R.S. 286 



Researches on the Phosphorus-Bases. No. XIV. Action of Triethyl- 

 phosphine on the Substitution-compounds of Marsh-Gas. By 

 A. W. Hofmann, LL.D., F.R.S 290 



On the Lunar Semidiurnal Variation of the Barometer. By John 

 Allan Broun, Esq., F.R.S , 207 



On the Law of Disturbance and the Range of the Diurnal Variation 

 of Magnetic Declination near the Magnetic Equator, with reference 

 to the Moon's Hour-angle, By John Allan Broun, Esq., F.R.S. . . 298 



