PROCEEDINGS 



OF 



THE ROYAL SOCIETY. 

 Series B. Vol. 81. No. B 546. 



BIOLOGICAL SCIENCES. 



CONTENTS. 



Page 



The Selective Permeability of the Coverings of the Seeds of Hordeum 

 vulgare. By ADRIAN J. BROWN, Professor of Brewing in the 

 University of Birmingham ......... 82 



The Origin of Osmotic Effects. II.— Differential Septa. By HENRY E. 



ARMSTRONG, F.R.S. . 94 



On the Determination of a Coefficient by which the Rate of Diffusion of 

 Stain and other Substances into Living Cells can be Measured, and by 

 which Bacteria and other Cells may be Differentiated. By HUGH C. 

 ROSS, late Surgeon R.N., Pathologist to the Royal Southern Hospital, 

 Liverpool. (Plate 3) 97 



The Origin and Destiny of Cholesterol in the Animal Organism. Part III. — 

 The Absorption of Cholesterol from the Food and its Appearance in the 

 Blood. By CHARLES DOR£E, Lindley Student of the University of 

 London, and J. A. GARDNER, Lecturer in Physiological Chemistry, 

 University of London . . . . . . . . , 109 



The Origin and Destiny of Cholesterol in the Animal Organism. Part IV. — 

 The Cholesterol Contents of Eggs and Chicks. By G. W. ELLIS and 

 J. A. GARDNER, Lecturer on Physiological Chemistry, University of 

 London ............ 139 



On the Cross-breeding of Two Races of the Moth Acidalia virgularia. By 



LOUIS B. PROUT, F.E.S., and A. BACOT, F.E.S. . . . .133 



The Nerves of the Atrio-ventricular Bundle. By J. GORDON WILSON, 

 M.A., M.B. (Edin.), Hull Laboratory of Anatomy, University of Chicago. 

 (Plates 4— 6) 15 « 



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 No. B 546. 



April S, 1909, 



