PROCEEDINGS OF 

 THE ROYAL SOCIETY. 



VOL. XXVII. 



CONTENTS. 



March 7, 1878. 



PAGE 



I. On the Photometry of the Magneto-Electric Light. By Captain W. de W. 



Abney, R.E., F.R.S .157 



II. Experimental Researches on the Temperature of the Head. By J. S. 

 Lombard, M.D., formerly Assistant-Professor of Physiology in Harvard 

 University, TJ.S 166 



III. Addition to Memoir on the Transformation of Elliptic Functions. By 

 A. Cayley, F.R.S., Sadlerian Professor of Pure Mathematics in the 

 University of Cambridge 177 



March 14, 1878. 



I. On Professor Haughton's Estimate of G-eological Time. By Oeorge H. 



Darwin, M.A., Fellow of Trinity College, Cambridge .... 179 



II. Some Experiments on Conductive Properties of Ice, made in Discovery 



Bay, 1875-6. By Staff Surgeon R. W. Coppinger, M.D. . . .183 



III. On the Function of the Sides of the Vessel in maintaining the State of 



Supersaturation. By Charles Tomlinson, F.R.S 189 



March 21, 1878. 



I. Contact Theory of Voltaic Action. Parts I and II. By W. E. Ayrton 

 and John Perry, Professors in the Imperial College of Engineering, 

 Tokio, Japan . . .196 



II. On the Viscosity of Dielectrics. No. I. By W. E. Ayrton and John 



Perry, Professors in the Imperial College of Engineering, Tokio, Japan . 238 



III. Recent Experiments on Fog-Signals. By Dr. Tykdall, F.R.S. , Professor 



of Natural Philosophy in the Royal Institution . . . . . 245 



For continuation of Contents see 4dh page of the Wrapper. 

 Price Four Shillings. 



