PROCEEDINGS 



OF 



THE ROYAL SOCIETY. 



Series B. Vol. 85. No. B 580. 



BIOLOGICAL SCIENCES. 



CONTENTS. 



Page 



The Electrical Conductivity of Bacteria, and the Rate of Sterilisation of 

 Bacteria by Electric Currents. By W. M. THORNTON, D.Sc, D.Eng., 

 Professor of Electrical Engineering in Armstrong College, Newcastle-on- 

 Tyne . 331 



An Investigation into the Life-history of Cladothrix dichotoma (Cohn). By 



DAVID ELLIS, Ph.D., D.Sc, F.R.S.E. (Plate 8) 344 



Studies on Enzyme Action. XVI. — The Enzymes of Emulsin. (I) Prunase, 

 the Correlate of Prunasin. By H. E. ARMSTRONG, F.R.S., E. F. 

 ARMSTRONG, and E. HORTON 359 



Studies on Enzyme Action. XVII. — Enzymes of the Emulsin Type. 



(II) The Distribution of /^-Enzymes in Plants. ByH. E. ARMSTRONG, 

 F.R.S., E. F. ARMSTRONG, and E. HORTON 3°3 



Studies on Enzyme Action. XVIII. — Enzymes of the Emulsin Type. 



(III) Linase and other Enzymes in Linaceae. By H. E. ARMSTRONG, 



F. R.S., and J. VARGAS EYRE, M.A., Ph.D 37<> 



Observations on Fowls and Ducks in Uganda with Relation to Trypanosoma 



gallinarum and T. gambiense. By Dr. H. L. DUKE. (With a Note by 



Miss MURIEL ROBERTSON.) (Plate 9) 37» 



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

 On the Cholesterol Content of the Tissues, other than Liver, of Rabbits 

 under Various Diets and during Inanition. By G. W. ELLIS and 

 J.A.GARDNER . 385 



A Note on the Protozoa from Sick Soils, with some Account of the Life- 

 Cycle of a Flagellate Monad. By C. H. MARTIN, M.A., late 

 Demonstrator in Zoology at Glasgow University and at the Imperial 

 College of Science (Plate 10) 393 



Further Observations on the Variability of Streptococci in Relation to Certain 

 Fermentation Tests, together with some Considerations Bearing on its 

 Possible Meaning. By E. W. AINLEY WALKER, M.A., D.M., Fellow 

 and Tutor of University College, and Lecturer in Pathology in the 

 University of Oxford 400 



The Specific Conductivity of Solutions of Oxyhaemoglobin. By Prof. 



G. N.STEWART 4>3 



PRINTED FOR THE ROYAL SOCIETY AND SOLD BY 

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

 Price Four , 



No. B 580. 



August 20, 1912. 



