PRESS NOTICES— contm ned 



"This is a valuable and (■()ni|)rehensi\e rt'siiiiit\ world-wide in scope, 

 of recent literature, since it summarises within the confines of a small 

 volume the essentials of a host of contributions. It is a very handy 

 reference work in all fields of economic entomology. It should be in 

 the hands of entomologists, in entomological libraries, and in the general 

 libraries of the country." — Joiaiuil of Economic Entomology. 



"The book is packed tight with all kinds of useful information. It 

 will enable the specialist to link up his own branch with others, and to 

 draw upon them for new ideas. To the beginner it will not only afford 

 an insight into the methods employed but should offer much inspiration 

 in indicating how broad is the field, and how much remains to be done. 

 To the general economic entomologist it will prove a \ery readable 

 textbook and a handy book of reference."' — Annals of Applied lUology. 



■' An orderly comprehensive treatment of the principles of insect 

 control. A very useful text and reference work." — Proceedings of /lie 

 Entomological Society of W^asliingfon, D.C. 



"A useful compendium of a subject involving ramifications into 

 many more or less discontinuous branches of natural science.'' — Revii^o 

 of Applied Entomology. 



No. 2. Price i6s. net, Illustrated. 



THE QLIANTITATIVE 

 METHOD IN BIOLOGY 



Bv JULIUS MACLEOD, Dr. Nat. Sc. 



LATE PROFESSOR OF IIOT.WY I.\ THK UNIVFKSITV OF GHENT 



AT THE UNIX^ERSITY PRESS 



23 LIME GROVE, 0.\FOKI> RO.AD, ^LA^•CHEST1•:R 



LONGMAX.S, GREEN & CO.MPAXV 



39 TA nCRXOsrEK RiiW, I.OXDOX, E.C. 4 



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