University of Chicago Press 
THE MECHANISTIC CONCEPTION OF LIFE. Biological Essays by 
Jacques Loeb, Head of the Department of Experimental Biology, Rockefeller 
Institute for Medical Research. 
238 pages, 12mo, cloth; 6s. net. 
The achievements of Professor Jacques Loeb in the field of experimental 
biology have made him so widely known as to ensure any book of his a large 
circle of readers. His experimental work at the universities of Chicago and 
California, as well as in his present position, gives this volume an especial 
significance. 
In this his latest work Professor Loeb presents many of the current problems 
in biology, and discusses the question whether the phenomena of life can be ex¬ 
plained by physical and chemical laws. He finds it possible to control by physical 
or chemical means not merely the processes of reproduction, but also the conduct 
of animals with reference to environment. 
“The profession, as well as everyone interested in biology, will thank the author and the 
publishers for collecting these essays and placing them before the reading public.”— The New 
York Medical Journal 
“All eager to know more of the origin of life will find no modern book of its size nearly so 
instructive or inspiring.”— Johns Hopkins Hospital Bulletin 
The publications of the University of Chicago Press, a full catalogue of which will 
be sent on application, are sold in the United Kingdom and the British Colonies by 
THE CAMBRIDGE UNIVERSITY PRESS, Fetter Lane, London, E.C. 
THE 
JOURNAL OF HYGIENE 
PLAQUE SUPPLEMENT III 
EIGHTH REPORT ON PLAGUE 
INVESTIGATIONS IN INDIA 
ISSUED BY THE ADVISORY COMMITTEE APPOINTED BY THE SECRETARY 
OF STATE FOR INDIA, THE ROYAL SOCIETY AND THE LISTER 
INSTITUTE. 
CONTENTS 
LXIV. The influence of cultivation in serum-containing media upon the virulence and 
immunising properties of the plague bacillus. By S. Rowland. (With Plate 
XYI) 
LXY. The influence of the medium in which the plague bacillus is propagated upon the 
facility with which it is ingested by human leucocytes. By R. St John Brooks 
LXVI. The morphology of the plague bacillus. By S. Rowland. (With Plates XVII-XXIII) 
LXYII. Observations on the mechanism of the transmission of plague by fleas. By A. W. 
Bacot and C. J. Martin. (With Plates XXIV-XXVI and 4 Text-figures) 
LXVIII. Influence of the medium in which B. pestis is propagated upon its virulence. By 
S. Rowland 
LXIX. A study of the bionomics of the common rat fleas and other species associated with 
human habitations, with special reference to the influence of temperature and 
humidity at various periods of the life history of the insect. By A. W. Bacot. 
(With Plates XXYII-XXXIV, 12 Charts and 3 Text-figures) 
LXX. On the survival of bacteria in the alimentary canal of fleas during metamorphosis 
from larva to adult. By A. W. Bacot 
LXXI. The effect of the vapours of various insecticides upon fleas (Ceratophyllus fasciatus 
and Xenopsylla cheopis) at each stage in their life history and upon the bed bug 
(Cimex lectularius ) in its larval stage. By A. W. Bacot. (With 1 Text-figure) 
The new series of Plague Supplements now being issued are, in 
pagination, completely independent of the Journal, although subscribers 
to the latter will receive copies without extra cost. The price to non¬ 
subscribers is 7s. net each, parts I and II; 10s. net, part III. 
CAMBRIDGE UNIVERSITY PRESS, FETTER LANE, LONDON 
C. F. CLAY, Manager 
