Contents. 



IX 



October 30, 1893. page 



Criticism of the Geological evidence for the Recurrence of Ice Ages. 



Parts II. and III. By Prof. Hughes 219 



October 29, 1894. 



Note on Geometrical Mechanics. By Prof. Sir R. S. Ball . . . 240 

 On the Construction of a model of 27 Straight Lines upon' a Cubic 



Siu-face. By W. H. Blythe 241 



Exhibition of some photographs shewing the marks made by stars on 



photographic plates exposed near the focus of a visual telescope. 



By H. F. Newall 248 



November 12, 1894. 



On the inadequacy of the Cell Theory and on the development of Nerves. 



By A. Sedgwick 248 



Note on the evolution of gas by water-plants. By F. Darwin . . 248 



November 26, 1894. 



On Benham's Artificial Spectrum. By Prof. G. D. Liveing . . . 249 

 A simple test case of Maxwell's Law of Partition of Energy. By G. H. 



Bryan 250 



February 11, 1895. 



A method of comparing the Conductivities of Badly Conducting sub- 

 stances for rapidly Alternating Currents. By Prof. J. J. Thomson 258 

 The Calibration of a Bridge Wire. By E. H. Griffiths . . . .269 



February 25, 1895. 



On Binocular Colour-mixture. By W. H. R. Rivers .... 273 



On a new Parasite probably allied to EcMnorhynclms. By A. E. Shipley. 277 



Notes on Pachytheca. By A. C. Seward 278 



