Cambridge University Press 
HOUSE-FLIES AND HOW THEY SPREAD DISEASE 
By C. G. HEWITT, D.Sc., Dominion Entomologist, Ottawa, Canada. 
Cambridge Manuals Series. Cloth, Is. net-, leather 2s. 6d. net. 
“ This little book rives an excellent description of the anatomical structure, the life histoiy, and the breeding 
habits of the comnion house-fly. There is also a good account of the parasites and natural enemies of the fly, which 
enables us to realise what becomes of the hordes of flies, incidental to a hot summer, when cold weather commences. 
-The measures necessary to control the propagation of flies form the subject of a final chapter .”—Journal of the 
Soyal Sanitary Institute 
“The little book here under notice — is of really fascinating interest. It deals with a subject which is daily 
being regarded as of increasing importance in the prevention of disease.The arrangement and descriptions are 
scientific and exact.—Medical Officer 
THE PSYCHOLOGY OF INSANITY 
By BERNARD HART, M.D. (Lond.), Lecturer in Psychiatry, University 
College Hospital Medical School; Medical Superintendent, North¬ 
umberland House Asylum. 
Cambridge Manuals Series. Cloth, Is. net ; leather 2*. 6d. net. 
“In this little work_the author has briefly presented in lucid readable form the more important recent 
developments in abnormal psychology which have yielded results of fundamental Importance or which have acquired 
a satisfactory claim to recognition. In this book the author, after briefly reviewing the history of insanity, goes on 
to explain what is meant by the psychological conception, and then arranges the subject-matter of the book in such 
away that the three successive steps of the method of science appear in logical order.An earnest attempt has 
been made to lay the essential features of this interesting section of science concisely before the reader and an 
excellent groundwork has been prepared upon which to build a more extensive knowledge of the subject."— 
Asylum News 
THE 
JOURNAL OF HYGIENE 
PLAQUE SUPPLEMENT I 
SIXTH 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. 
206 pp. with 14 plates, 3 maps, 6 charts, etc. Price 7s. net 
CONTENTS 
XL. Major George Lamb, M.D. Glasg., I.M.S. With portrait 
XLI. Epitome of some recent observations on rat-fleas 
XLII. Preliminary observations on the protective and curative value for rats of the serum of 
a horse immunised with a toxic nucleo-protein extracted from the plague bacillus 
XLIII. Second report on investigations into plague vaccines 
XLIV. Statistical investigation of plague in the Punjab. Second report: On the connection 
between proximity to railways and frequency of epidemics 
XLV. Statistical investigation of plague in the Punjab. Third report: On some of the 
factors which influence the prevalence of plague 
XLVI. Observations on plague in Eastern Bengal and Assam 
XLVII. Observations on the breeding of Bins rattus in captivity 
The ne-w 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. The Second Plague Supplement, containing the 
Seventh Report, will be ready immediately. 
CAMBRIDGE UNIVERSITY PRESS, FETTER LANE, LONDON 
C, F. CLA Y, Manager 
