PROCEEDINGS 



OF 



THE ROYAL SOCIETY. 



Series B. Vol. 90, 



No. B 624. 



BIOLOGICAL SCIENCES. 



CONTENTS. 



Page 



The Distribution in Wheat, Rice, and Maize Grains of the Substance, the 

 Deficiency of which in a Diet causes Polyneuritis in Birds and Beri-beri 

 in Man. By HARRIETTS CHICK and E. MARGARET HUME . . 44 



The Effect of Exposure to Temperatures at or above 100° C. upon the 

 Substance (Vitamine) whose Deficiency in a Diet causes Polyneuritis 

 in Birds and Beri-Beri in Man. By HARRIETTS CHICK and 

 E. MARGARET HUME 60 



Two Cases of Congenital Night-Blindness. By Sir W. DE W. ABNEY. 



K.C.B.. F.R.S 69 



Obituary Notices of Fellows deceased : — Daniel Oliver (with portrait) ; 



Captain Geoffrey Watkins Smith ...... xi — xix 



PRINTED FOR THE ROYAL SOCIETY and sold by 



HARRISON & SONS. 45, ST. MARTIN'S LANE, LONDON. W.C. 



Price Two Shillings and Sixpence. 



No. B 624. 



December 1, 1917. 



