Contents. 



IX 



November 8, 1897. page 



Farmer's method of demonstrating assimilation. By Francis Darwin . 338 

 Artificial Cultures of Stereum, a Timber-destroying Fungus. By Prof. 



Marshall Ward 340 



On EucepJudartos GheUinchii, Lem., a rare Cycad. By A. C. Seward . 340 



November 22, 1897. 



Partial Differential Equations of the Second Order. By Prof. Forsyth . 345 



Electrical Properties of Newly Prepared Gases. By John S. Townsend 345 

 A chemical effect produced by the impact of kathode rays. By Prof. 



J. J. Thomson and S. Skinner ........ 371 



The effect of zinc and other metals on a photographic plate. By Prof. 



J. J. Thomson 372 



December 6, 1897. 



Notes on some Hawaiian Insects. By B. C. L. Perkins . . . 373 



Remarks on a journey to investigate the habits and development of 



Lepidosiren parado.va. By J. Graham Kerr ..... 380 



January 24, 1898. 



A New Method in Combinatory Analysis with applications to Latin 



Squares and associated questions. By Major P. A. MacMahon . 381 



Abelian Functions in connexion with two-dimensional fluid motions. 



By H. F. Baker 381 



On the production of a cloud by the action of ultra-violet light on moist 



air. By C. T. R. Wilson 392 



On the use of logarithmic coordinates in Physics. By J. H. Vincent . 393 



On the Diffuse Reflection of Rontgen Rays. By Prof. J. J. Thomson . 363 



February 7, 1898. 



Some Zoological Results of a Voyage to Melanesia during the years 



1894—1897. By Arthur Willey 398 



February 21, 1898. 



On some differential equations in the theory of symmetric algebra. By 



Prof. Forsyth 401 



The Discharge of Electrification by Ultra-violet Light. By E. Ruther- 

 ford 401 



Rontgen photographs of metallic alloys. By C. T. Heycock and F. H. 



Neville - .... 417 



