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OF THE V, < r\ < 



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CAMBRIDGE PHILOSOPHICAL 

 SOCIETY. 



VOL. III. PART VI. 



[February to May, 1879.] 



CONTENTS: 



~ , PAGE 



Prof. Caylet, On the Newton-Fourier imaginary problem , . .231 

 Mr J. N. Langley, A prelitninarp account of some phenomena of the 



central nervous system of the frog . . . . . . . 232 



Mr A. G. Greenhill, On the rotation of a liquid ellipsoid about its 



mean axis . ~ . . . . . . . . . . .233 



Prof. Hughes, On the relation of the appeara.nce and duration of the 



various forms of life upon the earth to the breaks in the continuity 



of the sedimentary strata . . . 246 



Prof. LivEiNG, On the dispersion of a solution of mercuric iodide . . 258 

 Prof. LivEiNG, On a new spectroscope ... . . . . 260 



Mr C. Taylor, On the geometrical x>roof of Lambert's theoretn . . 261 

 Mr P. M. Balfottr, On certain points in the anatomy of Peripatus 



Capensis 266 



Mr J. W. L. GiiAiSHER, On a symbolic theorem involving repeated 



differentiations . . .269 



Mr 0. Fisher, Notes on a mammaliferous deposit at Barrington, near 



Cambridge . . . 271 



PRINTED AT THE UNIVERSITY PRESS. 



AND SOLD BY 



DEIGHTON, BELL AND CO. AND MACMILLAN AND CO. CAMBRIDGE ; 

 BELL AND SONS, LONDON. 



1879 



