PROCEEDINGS OF 

 THE ROYAL SOCIETY. 



VOL. XV. No. 92. 



CONTENTS. 

 April 4, 1867. 



PAGE 



I. Researches on Gun-cotton. — Second Memoir. On the Stability of Gun- 

 cotton. By F. A. Abel, F.R.S., Y.P.C.S. . 417 



II. Observations of Temperature during two EcHpses of the Sun (in 1858 and 

 1867). By John Phillips, M.A., LL.D., D.C.L., F.E.S., Professor of 

 Geology in the University of Oxford 421 



April 11, 1867. 



I. A new fact relating to Binocular Vision. By A. Claudet, F.R.S. . . . 424 



II. On the Calculation of the liTumerical Value of Euler's Constant, which Pro- 

 fessor Price, of Oxford, calls E. By William Shanks, Esq., Houghton- 

 le- Spring, Durham 429 



III. On a Definite Method of QuaHtative Analysis of Animal and Vegetable 

 Colouring-matters by means of the Spectrum-Microscope. By H. C. 

 SoEBY, F.R.S. &c 433 



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