viii List of the Contributors. 



Robinson, Rev. T. R., D.D., F.R.S. page. 



On the Theory of the Cup Anemometer, and the Determina- 

 tion of its Constants, ....... 427 



SiGEESON, Geoege, M.D., F.L.S. 



On Heat as a Factor in Vital Action (so called), - . . . 1 



On Changes in the Physical Geography of Ireland, . . 6 

 On a Cause of the Buoyancy of Bodies of a greater Density 



than Water, 22 



SxrDDEET, Lancelot, LL.D., Ex-Sch., T.C.D., and Plunkett, 

 William, F.C.S. 



On the Constituents of the two principal Mineral Waters of 



Lisdoonvarna, County of Clare, . . . . .189 



Stitddeet, Lancelot, LL.D., Ex-Sch., T.C.D. 



An Estimation of the Free and Albuminoid Ammonia yielded 

 by the Stagnant Waters of the Dublin Streets, as compared 

 with the quantities of those Substances obtained from the 

 LifEey Water, after receiving the Sewage, . . . 459 



Tichboene, C. R. C, Ph. D. , • 



Laboratory Notes, 81 



On Further Researches of the Dissociation of Molecules in 



Solution, 230 



Weight, Edwaed Peeceval, M.D., F.L.S. 



On a New Genus and Species belonging to the Family 



Pandarina (Plate xxxv.), 583 



Notes on a small Collection of Foraminifera from the 



Seychelles, 586 



Description of a New Genus and Species of Sponge — 



Kallispongia Archeri (Plate xL), ..... 754 



Young, J. R., M.A. 



On some General Formulae for the Solution of Algebraical 



Equations of the Third Degree, &e., .... 26 



On a certain relation between the Quadratic Expression 

 Q^ - 3PP' and the Product of the Squares of the Differences 

 of the Roots of a Cubic Equation, 744 



