CONTENTS 



PAGE 



Prof. Bromwich, On a Definite Integral . . . . . .419 



Mr Gardiner, On the Unit of Classification for Systematic Biology . 423 



Mr Wilson, On Radio-active Rain ... . . . . 428 



Mr Cunningham, On an Attempt to detect the Ionisationof Solutions 



by the action of Light and Rontgen Rays . . . . . 431 



Mr Duckworth, Note on the Dispersive Povoer of Running Water on 

 Skeletons: tvith particular reference to the Skeletal Remains of 

 Pithecanthropus erectus . . . . ... . . . . 434 



Mr Be van. Reflexion and transmission of Light by a Charged Metal 



Surface . . . . . . ....'. . 438 



Messrs Gardiner and Hill, The Histology of the Endosperm during 



Germination in Tamils communis and Galium Tricorne (With Plate) 445 



Mr Brindley, Regeneration in Samia ailanthus . . ..."'.-. . 458 , 



Mr Gardiner, Some Notes on Variation and Protandry in Flabellum 



rubrum, and Senescence in the same and other Corals . . . 463 



Mr Baker, . Note on the Influence of Ultra Violet Radiation on the 



Discharge in a Vacuum Tube having a polished Zinc Electrode . 472 



Mr Vincent, Note on a general numerical connection between the atomic - 



weights . - ... . . . . . . . . 477 



Mr Pilon, On the variation with the wave-length of the double refraction 



in strained glass . . . . . .... . 478 



Mr Crossland, The Coral Reefs of Zanzibar (With Map) . . . 493 



Prof. Thomson, On Induced Radio-activity . '. . . . - : 504 



Prof. Thomson, On the increase in the electrical conductivity of air 



produced by its passage through water .. . ... . 505 



