CONTENTS. 



SERIES B. VOL, LXXXI. 



No. B 545.— March 13, 1909. 



PAGE 



Address of the President, Lord Bayleigh, O.M., D.C.L., at the Anniversary Meeting 



on November 30, 1908 1 



A Trypanosome from Zanzibar. By Colonel Sir David Bruce, C.B., M.B., F.B.S., 



D. Sc, LL.D., Army Medical Service, and Captains A. E. Hamerton, D.S.O., 



and H. B. Bateman, Boyal Army Medical Corps. (Plates 1 and 2) 14 



A Summary of further Researches on the Etiology of Endemic Goitre. By Bobert 

 McCarrison, M.B., B.Ch., Captain, Indian Medical Service. Communicated by 

 Major Eonald Eoss, C.B., F.E.S '. 31 



The Proportion of the Sexes produced by "Whites and Coloured Peoples in Cuba. 



By Walter Heape, M.A., F.R.S., Trinity College, Cambridge. (Abstract) 32 



Electrolytes and Colloids. — The Physical State of Gluten. By Prof. T. B. Wood 



and W. B. Hardy, F.E.S 38 



The Colours and Pigments of Flowers with Special Eefereuce to Genetics. By 



M. "Wheldale. Communicated by W. Bateson, F.E.S 44 



An Experimental Estimation of the Theory of Ancestral Contributions in Heredity. 

 By A. D. Darbishire, Demonstrator of Zoology in the Boyal College of Science, 

 London. Communicated by J. Bretland Farmer, F.E.S 61 



The Action of the Venom of Sepedon hcemaehates of South Africa. By Sir Thomas 



E. Fraser, M.D., LL.D., Sc.D., F.E.S., Professor of Materia Medica, University 

 of Edinburgh ; and James A. Gunn, M.A., B.Sc, M.D., Assistant in the 

 Materia Medica Department, University of Edinburgh. (Abstract) 80 



No. B 546.— April 5, 1909. 



The Selective Bermeability of the Coverings of the Seeds of Hordewm vulgare. By 

 Adrian J. Brown, Professor of Brewing in the University of Birmingham. 

 Communicated by Prof. H. E. Armstrong, F.E.S 82 



The Origin of Osmotic Effects. II.— Differential Septa. By Henry E. Armstrong, 



F. E.S , 94 



