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OF THE

CAMBRIDGE PHILOSOPHICAL

SOCIETY.

VOLUME IV.

OCTOBER 25, 1880–MAY 28, 1883.

Cambridge :
PRINTED AT THE UNIVERSITY PRESS.

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

BELL AND SONS, LONDON.

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February 7, 1881.

Determination of the greatest height consistent with stability that a

vertical polo or mast can be made, and of the greatest height to

which a tree of given proportions can grow. By A. G. Groenhill. 65

February 21, 1881.

On the estimation of ferment in gland-cells by means of osmic acid. By

J. N. Langley . .

March 7, 1881.

On the action of the vagus nerve upon the frog's heart. By W. H.

Gaskell . . . .

*On the ancestral form of the chordata. ' By F. M. Balfour : : : 78

March 21, 1881.

On conjugate functions of Cartesians and other quartics. By A. G.

Greenhill . . . . . . .

: . . . . . 77

*On a mathematical law of interest in political economy. By Akin-

Karoly · · · · · · · · · · · · 92

May 9, 1881.

On the probable secular change in the position and aspect of the con.

stellation Ursa Major. By J. B. Pearson .

On sympathetic needles. By J. B. Pearson . . .

May 23, 1881.

On the elliptic-function solution of the equation 28+y3 – 1=0. By

Professor Cayley . . . . . . . . . . 106

Continued observations on the state of an eye affected with a peculiar

malformation. By Sir G. B. Airy . .

On the mechanism of the renal secretion. By C. S. Roy . . 110

October 31, 1881.

Remarks by the President ..

Note on A bel's theorem. By Professor Cayley : : : : : 119

November 14, 1881.

On the rocks of the Channel Islands. No. II. By Professor Liveing. 122

November 28, 1881.

Celestial chemistry from the time of Newton. By T. Sterry-Hunt . 129

On the upper Bagshot Sands of Hordwell Cliffs, Hampshire. By E. B.

Tawney . . . . .

. . . . . . 140

On some equations connected with the electro-magnetic theory of light.

By R. T. Glazebrook

On a method of deriving formulae in elliptic functions. By J. W. L.

Glaisher . . . . . . . . . . . . 186

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