SCIENCE PROGRESS 



IN THE TWENTIETH CENTURY 

 [ A QUARTERLY JOURNAL OF 

 | SCIENTIFIC WORK 



& THOUGHT 



VOL. VIII 

 NO. 30. OCTOBER 1913 



EDITOR 



SIR RONALD ROSS, K.C.B., F.R.S., N.L. : 

 D.Sc, LL.D., M.D., F.R.C.S. 



LONDON 

 JOHN MURRAY, ALBEMARLE STREET, W. 



*9*3 



