iv 



No. 248.— November 18, 1886. 



Page 



On the Method of Condensation in Calorimetry (Abstract). By J. Joly, 

 B.E., Assistant to the Professor of Civil Engineering, Trinity College, 

 Dublin 248 



On the Specific Heats of Minerals. By J. Joly, B.E., Assistant to the 

 Professor of Civil Engineering, Trinity College, Dublin 250 



Note on a paper entitled " On a New Form of Stereoscope " (' Boy. Soc. 

 Proc.,' vol. 40, p. 317). By A. Sfcroh 274 



On the Intensity of Light reflected from certain Surfaces at nearly 

 Perpendicular Incidence. By Lord Bayleigh, M.A., D.C.L., Sec. B.S. 

 (Plate 3) 275 



A Theory of Yoltaic Action. By J. Brown (Plates 4 and 5) 294 



The Coefficient of Viscosity of Air. Appendix. By Herbert Tomlinson, 

 B.A 315 



November 25, 1886. 



Additional Evidence of the Affinities of the Extinct Marsupial Quadruped, 

 Thylacoleo carnifex, Ow. By Sir Bichard Owen, K.C.B., F.B.S 317 



On the Structure and Life-History of Entyloma Ranunculi (Bonorden). 

 By H. Marshall Ward,- M.A., F.L.S., Fellow of Christ's College, 

 Cambridge, and Professor of Botany in the Forestry School, Royal 



Indian Engineering College, Cooper's Hill 318 



On Jacobi's Figure of Equilibrium for a Kotating Mass of Fluid. By G. 

 H. Darwin, M.A., LL.D., F.R.S., Fellow of Trinity College and 

 Plumian Professor in the University of Cambridge 319 



On the Dynamical Theory of the Tides of Long Period. By G. H. 

 Darwin, M.A., LL.D., F.R.S., Fellow of Trinity College and Plumian 

 Professor in the University of Cambridge 337 



List of Presents.. 343 



On the Method of Condensation n Calorimetry. By J. Joly, B.E., 

 Assistant to the Professor c f Civil Engineering, Trinity College, 

 . Dublin (Plates 6 and 7) .' 352 



No. 249.— November 30, 1886. 

 Anniversary Meeting. 



Report of Auditors 372 



List of Fellows deceased since last Anniversary 372 



elected 373 



Address of the President 373 



Election of Council and Officers 386 



