PEOCEEDINGS OF 



THE ROYAL SOCIETY. 



VOL. XLI. 



No. 248. 



November 18, 1886. 



CONTENTS. 



PAGE 



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

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



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



Professor of Civil Engineering, Trinity College, Dublin . . . 250 



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



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



IV. On the Intensity of Light reflected from certain Surfaces at nearly 

 Perpendicular Incidence. By Lord Eayleigh, M.A., D.C.L., Sec. E.S. 



V. A Theory of Voltaic Action. By J. Beown (Plates 4 and 5) . . . 294 

 VI. The Coefficient of Viscosity of Air. Appendix. By Heebeet Tomlin- 



November 25, 1886. 



I. Additional Evidence of the Affinities of the Extinct Marsupial 

 Quadruped, Thylacoleo carnifex, Ow. By Sir Eichaed Owen, K.C.B., 

 E.R.S 317 



II. On the Structure and Life-History of JEntyloma ranunculi (Bonorden). 

 By H. Maeshall Wabd, M.A., E.L.S., Fellow of Christ's College, 

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

 Indian Engineering College, Cooper's Hill 318 



III. On Jacobi's Figure of Equilibrium for a Eotating Mass of Fluid. By 



G-. H. Daewijt, M.A., LL.D., F.E.S., Fellow of Trinity College and 

 Plumian Professor in the University of Cambridge .... 319 



IV. On the Dynamical Theory of the Tides of Long Period. By Gr. H. 



Daewin, LL.D., F.R.S., Fellow of Trinity College and Plumian 

 Professor in the University of Cambridge . . . . . 337 



College, Dublin 



248 



(Plate 3) 



275 



son, B.A. 



315 



For continuation of Contents see 4<th 'page of Wrapper. 



Price Six Shillings. 



