viii Contents. 



Novemler 18, 1878. 



Some results of the last two total solar eclipses. By Arthur Schuster . 209 

 On Grant's small calculating machine. By Arthur Schuster . . .216 



December 2, 1878. 



On a new method of determining the limits of microscopic vision. By 



G. W. Royston-Pigott 217 



On the motion of two cylinders in a fluid. By W. M. Hicks . . 227 



February 10, 1879. 



Notes on a mammaliferous deposit at Barrington near Cambridge. By 



O. Fisher . . . . 231, 271 



February 24, 1879. 

 On the Newton-Fourier imaginary problem. By Professor Cayley . 231 



March 10, 1879. 



A preliminary account of some phenomena of the central nervous system 



of the frog. By J. N. Langley 232 



March 24, 1879. 



On the rotation of a liquid ellipsoid about its mean axis. By A. G. 



Greenhill 233 



May 5, 1879. 



On the relation of the appearance and duration of the various forms of 

 life upon the earth to the breaks in the continuity of the sedi- 

 mentary strata. By Professor T. McK. Hughes .... 246 



May 19, 1879. 



On the dispersion of a solution of mercuric iodide. By Professor Liveing 258 



On a new spectroscope. By Professor Liveing 260 



On the geometrical proof of Lambert's theorem. By C. Taylor , . 261 

 On certain points in the anatomy of Peripatus Capensis. By F. M. 



Balfour 266 



On a symbolic theorem involving repeated differentiations. By J. 



W. L. Glaisher 269 



On molecular physics in high vacua. By W. Crookes .... 271 



October 27, 1879. 



Table of A'"0''-=-n(m) up to ?^^=n = 20. By Professor Cayley . . 276 



On the problem of two pulsating spheres in a fluid. By W. M. Hicks . 276 



