CONTENTS 
Prof. Bromwich, On a Definite Integral . . - . . 
Mr Gardiner, On the Unit of Classification for Systematic Biology . 
Mr Wilson, On Radio-active Rain . . . . . . 
Mr Cunningham, On an Attempt to detect the Ionisation of Solutions 
by the action of Light and Rontgen Rays 
Mr Duckworth, Note on the Dispersive Power of Running Water on 
Skeletons: ivith particular reference to the Skeletal Remains of 
Pithecanthropus erectus 
Mr Bevan, Reflexion and transmission of Light by a Charged Metal 
Surface . . . . ... . .. . 
Messrs Gardiner and Hill, The Histology of the Endosperm during 
Germination in Tamus communis and Galium Tricorne (With Plate) 
Mr Brindley, Regeneration in Sarnia ailanthus ..... 
Mr Gardiner, Some Notes on Variation and Protandry in Flabellum 
rubrum, and Senescence in the same and other Corals . 
Mr Baker, Note on the Influence of Ultra Violet Radiation on the 
Discharge in a Vacuum Tube having a polished Zinc Electrode . 
Mr Vincent, Note on a general numerical connection between the atomic 
weights 
Mr Filon, On the variation with the wave-length of the double refraction 
in strained glass . , . . . . . . 
Mr Crossland, The Coral Reefs of Zanzibar (With Map) . . 
Prof. Thomson, On Induced Radio-activity . 
Prof. Thomson, On the increase in the electrical conductivity of air 
produced by its passage through water . 
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