PROCEEDING 



OF THE 



CAMBRIDGE PHILOSOPHICA 

 SOCIETY. 



VOL. IV. PART II. 

 [Lent and Easter Terms, 1881.] 



contents : 



PACK 



Mr A G Geeenhill, Determination of the greatest height consistent 

 with stability that a vertical pole or mast can be made, and of 

 the greatest height to which a tree of given proportions can grow 60 



Mr J. N. Langley, On the estimation of ferment in gland-cells by 

 means of osmic acid • • ' * ■' 



Dr W. H. Gaskell, On the Action of the Vagus Nerve upon the frog s 



heart . • • • • • ■ ' " ' * » ' 



Mr A. G. Geeenhill, On Conjugate Functions of Cartesians and other 



Quartics ' '',}- 1 J 



Dr J. B. Pearson, On the probable secidar change in tU position and 



aspect of the Constellation Ursa Major 93 



Dr J. B. Pearson, On Sympathetic Needles 96 



Special General Meeting . • ■ ■ ■ • • 



Prof Cayley On the elliptic-function solution of the equation 



' tT 3 + 2/ 3_l = 106 



Sir G. B. Aiey, Continued observations on the state of an eye affected 



with a peculiar malformation J 



Dr C. S. Roy, On the mechanism of the renal secretion . . • • 110 



ODambribge ; 



PRINTED AT THE UNIVERSITY PRESS. 



AND SOLD BY 



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

 BELL AND SONS, LONDON. 



1881 



