CONTENTS. 
VOL. VI. 
October 25, 1886. 
On the Potentials of the surfaces formed by the revolution of Limagons 
and Cardioids about their axes. By A. B. Basset 
An attempt to explain certain geological phenomena by the Application 
to a liquid substratum of Henry’s law of the absorption of gases. 
By O. Fisher : 
On a new method of igiomminine Sneeiiie iiahnetiine Chpactiy: By L. R. 
Wilberforce : 
On Lagrange’s Equations a Npiiem, By James C. ‘MConnel 
November 8, 1886. 
On the Ceelom and Body-cavity of Peripatus and the Arthropoda. By 
Adam Sedgwick F : : : . : 
Note on the ‘ Vesicular Vessels’ at the Onion, ra S. H. Vines and 
A. B. Rendle . 
On Epiclemmydia Tesiameah a a new genus of alee Ey, M. O. Botte ; 
On a peculiar organ of Hodgsonia heteroclita. By W. Gardiner . 
November 22, 1886. 
Note de Géométrie cinématique. By Prof. Mannheim . 
On the Mechanical Force acting on an Element of a Magnet aomrpting 
a Current. By J. C. M°Connel 
The problem of three moments, By R. R, Webb 
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