PROCEEDINGS OF 

 THE ROYAL SOCIETY. 



VOL. XXX. 



CONTENTS. 



April 8, 1880. 



I. Note on Thermal Transpiration. By O. Reynolds, F.R.S., Professor of 

 Engineering in Owens College, Manchester. In a letter to Profe ssor 

 Stokes, Sec. R.S 300 



II. On the Sensitive State of Vacuum Discharges. Part II. By William 

 Spottiswoode, D.C.L., LL.D. Pres. R.S., and J. Fletchee Moulton, 

 M.A., late Fellow of Christ's College, Cambridge 302 



April 15, 1880. 



I. Description of some Remains of the Grigantic Land-lizard (Megalania 

 Prisca, Owen) from Australia. Part II. By Professor Owen, C.B.. 

 F.R.S .304 



II. On an Electro -Magnetic Gyroscope. By M. Wilebid de Fonyielle . 305 



III. Report on the Exploration of the Caves of Borneo. By A. Haet 

 Eveeett. Introductory Remarks. By John Eyans, D.C.L., LL.D., 

 Treas. R.S. ; and Note on the Bones Collected. By a. Busk, Y.P.R.S. 310 



April 22, 1880. 



I. Effects of Electric Currents on the Surfaces of Mutual Contact of Aqueous 



Solutions. By a. Gobe, LL.D., F.R.S 322 



II. On the Critical State of Gases. By William Ramsay, Ph.D., Professor 



of Chemistry in University College, Bristol 323 



III. Revision of the Atomic Weight of Aluminium. By J. W. Mallet, 



F.R.S., Professor of Chemistry in the University of Virginia . . 329 



IY. On the Height of the Aurora Borealis. By Waeben De La Rue. MA., 



D.C.L., F.R.S., and Hugo W. Mullee, Ph.D., F.R.S. . . .332 



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