CONTENTS. 



SERIES B. VOL. LXXXV. 



No. B 576.— April 10, 1912. 



PAGE 



An Antelope Trypanosoma By Captain A. D. Fraser, B.A.M.C., and Dr. H. L. 



Duke. Communicated by Sir J. Rose Bradford, Sec. R.S 1 



The Relation of Wild Animals to Trypanosomiasis. By Captain A. D. Fraser, 

 R.A.M.C., and Dr. H. L. Duke. Communicated by Sir J. R. Bradford, 



Sec. R.S'. '.. 2 



The Transmission of Trypanosoma nanum (Laveran). By Dr. H. L. Duke. 



Communicated by Sir J. Rose Bradford, Sec. R.S 4 



The Causes and Prevention of Miners' Nystagmus. By T. Lister Llewellyn, M.D., 

 B.S. (Lond.), Tyndall Research Student. Communicated by Dr. J. S. Haldane, 

 F.R.S ....... 10 



On the Effects of Castration and Ovariotomy upon Sheep. By F. H. A. Marshall, 

 Fellow of Christ's College, Cambridge, and University Lecturer in Agricultural 

 Physiology. Communicated by Prof. J. N. Langley, F.R.S 27 



The Stomatograph. By W. Lawrence Balls, M.A., Fellow of St. John's College, 

 Cambridge, Membre de l'lnstitut Egyptien, Botanist to the Egyptian 

 Government Department of Agriculture. Communicated by Francis Darwin, 

 F.R.S ; 33 



Further Experiments on the Cross-breeding of Two Races of the Moth Aeidalia 

 virgularia. By W. B. Alexander, B.A., late Vintner Exhibitioner of King's 

 College, Cambridge. Communicated by Prof. E. B. Poulton, F.R.S 45 



An Instrument for Measuring the Distance between the Centres of Rotation of the 

 Two Eyes. By H. S. Ryland and B. T. Lang, F.R.C.S. Communicated by 

 George J. Burch, M.A., D.Sc, F.R.S 53 



Composition of the Blood Gases during the Respiration of Oxygen. By George A. 



Buckmaster and J. A. Gardner. Communicated by Dr. A. D. "Waller, F.R.S. 56 



The Physiological Effects of Low Atmospheric Pressures, as Observed on Pike's 

 Peak, Colorado. (Preliminary Communication.) By C. Gordon Douglas, B.M., 

 Fellow of St. John's College, Oxford ; J. S. Haldane, M.D., LL.D., F.R.S., 

 Fellow of New College, Oxford ; Yandell Henderson, Ph.D., Professor of 

 Physiology, Yale University Medical School ; and Edward C. Schneider, Ph.D., 

 Professor of Biology, Colorado College 65 



