PROCEEDINGS 



OF 



THE ROYAL SOCIETY. 



Series B. Vol. 90, No. B 628, 



BIOLOGICAL SCIENCES. 



CONTENTS. 



Page 



On the Quantitative Differences in the Water-Conductivity of the Wood in 

 Trees and Shrubs. Part I. — The Evergreens. By J. BRETLAND 

 FARMER, F.R.S., Professor of Botany in the Imperial College of Science 

 and Technology . . . . . . . . . .218 



On the Quantitative Differences in the Water-Conductivity of the Wood in 

 Trees and Shrubs. Part II —The Deciduous Plants. By J. BRETLAND 

 FARMER, F.R.S., Professor of Botany in the Imperial College of Science 

 and Technology 232 



The Production of Anthocyanins and Anthocyanidins. — Part III, By 



ARTHUR ERNEST EVEREST, D.Sc, Ph.D 251 



Note on the Nature of Growths in Colloidal Silica Solutions. By 



H. ONSLOW, Trinity College, Cambridge 266 



Obituary Notice of Fellov^ deceased : — Keith Lucas (with portrait) 



xxxi — xlii 



^Gl 19)1' 



PRINTED AND PUBLISHED FOR THE ROYAL SOCIETY BY 

 HARRISON & SONS, 44-47, ST. MARTIN'S LANE, LONDON, W.C.2. 



Price Four Shillings. 



No. B 628. 



July 1, 1918. 



