viii Contents. 



February 26, 1894. page 



On Current Sheets, especially on Ellipsoids and Anchor-Rings. By 



R H. D. Mayall 156 



The Complete System of Quaternariants for any Degree. By D. B. 



Mair 178 



The Configuration of a pair of equal and opposite hollow straight 

 vortices, of finite cross-section, moving steadily through fluid. By 

 H. C. Pockhngton 178 



March 12, 1894. 



Notes on the Bunbury Collection of Fossil Plants, with a list of type 



specimens in the Cambridge Botanical Museum. By A. C. Seward . 188 

 Note on the Liver Ferment, By M. C. Tebb 199 



April 30, 1894. 



The modifications of Fresnel's optical laws, that would apply to circum- 

 stances of magnetic as well as electric aeolotropy. By J. Larmor . 200 



On the Application of the Theory of Matrices to the Discussion of 

 Linear Diflerential Equations with Constant Coefficients. By 

 J. Brill 201 



14, 1894. 



Notes on a Dog's Heart infested with Filaria immitis. By Arthur E. 



Shipley 211 



Variations in the Larva of Asterina gihhosa. By E. W. MacBride . . 214 



On a new method of preparing culture media. By Dr Lorrain Smith . 217 



l/ay28, 1894. 



Exhibition of nest of Trochosa picta and of certain well-marked varieties 



of this spider. By C. Warburton 217 



Exhibition of Magnetic Rocks. By S. Skinner 217 



Geometrical proof of a Theorem of Convergency. By A. C. Dixon . .217 



