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. 
“Dr Hewitt’s little volume is especially comprehensive and well arranged. The book 
contains a bibliography and is sufficiently indexed and illustrated, making altogether, perhaps, 
as good a manual on the subject as could at the present state of our knowledge be produced in 
similar compass .”—Times 
“ Owing to the dangerous nature of the house fly and the general ignorance concerning its 
biology and habits. Dr Hewitt, some eight years ago, commenced to study the structure, develop¬ 
ment, and biology, also the relation of the house fly to the dissemination of disease. The 
results of his researches are now admirably given in this little volume, which should prove of 
great value, as it is now generally admitted, and the public are awakening to the fact that the 
common house fly is a dangerous little creature and a serious menace to the public health, and 
that steps should be immediately taken by all to keep down such a filthy and noxious pest. For 
this purpose full instructions will be found in this book .”—Field 
THE 
JOURNAL OF HYGIENE 
PLAQUE SUPPLEMENT II 
SEVENTH 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 
XLVIII. Plague in Madras City. (With 1 Chart) 
XLIX. Statistics of the occurrence of plague in man and rats in Bombay, 1907-11 
L. The distribution of white-bellied Mus rattus in Bombay Island. (With 1 Map) 
LI. The immunity of the wild rat in India. (With 1 Map) 
LII. Chronic or resolving plague. (With 1 Chart and Plate XV) 
LIH. The experimental production of resolving plague in rats 
LIV. Experimental plague epidemics among rats 
LV. Observations on flea-breeding in Poona. (With 7 Charts) 
LVI. The serum treatment of human plagne 
LVH. Attempt to separate the antigen from the nucleo-protein of the plague bacillus by 
filtration through gelatin. By Dr S. Rowland 
LVIH. Besredka’s method of vaccination. By Dr S. Rowland 
LIX. The relation of pseudotubercle to plague as evidenced by vaccination experiments. 
By Dr S. Rowland 
LX. Observations on the mechanism of plague immunity. By Dr S. Rowland 
LXI. The onset and duration of the immunity consequent on the inoculation of plague 
nucleoprotein. By Dr S. Rowland. (With 2 Charts) 
LXII. The opsonic index in plague vaccination. By Dr R. St John Brooks. (With 
5 Charts) 
LXIH. The preparation of antitoxic plague sera. By Dr A. T. MacConkey 
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. 
CAMBRIDGE UNIVERSITY PRESS, FETTER LANE, LONDON 
C. F. CLAY, Manager 
