PROCEEDINGS 



OF 



THE ROYAL SOCIETY. 



Series B. Vol. 85. No. B 576. 



BIOLOGICAL SCIENCES. 



CONTENTS. 



Page 



An Antelope Trypanosome. By Captain A. D. FRASER. RA.M.C, and 



Dr. H. L. DUKE i 



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



FRASER. R.A.M.C.. and Dr. H. L. DUKE 2 



The Transmission of Trypanosoma nanum (Laveran). By Dr. H. L. DUKE . 4 



The Causes and Prevention of Miners' Nystagmus. By T. LISTER 



LLEWELLYN, M.D., B.S. (Lend.). Tyndall Research Student io 



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 ....... 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 ..... 33 



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

 Acidalia virgularia. > By W. B. ALEXANDER, B.A., late Vintner 

 Exhibitioner of King's College, Cambridge ...... 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. . . 53 



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



GEORGE A. BUCKMASTER and J. A. GARDNER 5<* 



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 



The Development of a Leucocytozoon of Guinea-Pigs. By EDWARD 



HALFORD ROSS, M.R.C.S. England, L.R.C.P. London. (Plate 1) . . 67 



The Bacterial Production of Acetylmethylcarbinol and 2.3-Butylene Glycol 

 from Various Substances.— II. By ARTHUR HARDEN, F.R.S., and 

 DOROTHY NORRIS, Biochemical Department, Lister Institute . . 73 



On the Distribution of the Nerves of the Dental Pulp. By J. HOWARD 



MUMMERY. (Abstract) 79 



printed for THE ROYAL SOCIETY and sold by 



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



Price Three Shillings. 



No. B 576. 



April 10,1912. 



