THE CLIMATE OF THE 
CONTINENT OF AFRICA 
By ALEXANDER KNOX, B.A. (Cantab.), F.R.G.S. 
Royal 8vo. With 13 maps and a diagram 
Price 21s. net 
“ Such a work as this has not only become highly necessary, but should be in great demand 
amongst Governments, mining and commercial companies trading in Africa, missionary 
societies, and all individuals who intend to visit Africa for any length of time, or to settle in 
any part of that continent for purposes of health, science, education, or commercial gain..„ 
The maps contributed to this book by Mr J. G. Bartholomew under the direction of the author 
are admirable, and great praise must be awarded to the author for his general research, the 
clearness with which he sets forth his details and his conclusions, and the way in which he has 
invested what might seem to be a somewhat uninteresting subject with an interest and an 
importance sufficient to attract the general reader as well as the specialist. The book...should 
prove a standard work.”—Sir H. H. Johnston in Nature 
TICKS A Monograph of the Ixodoidea 
By GEORGE H. F. NUTTALL, M.D., Ph.D., Sc.D., F.R.S., CECIL 
WARBURTON, M.A., F.Z.S., W. F. COOPER, B.A., F.Z.S., F.L.S. 
and L. E. ROBINSON, A.R.C.Sc. (London) 
(PART I. THE ARGASIDAE. 5s. net 
Now ready \pART II. THE IXODIDAE. 12s. net 
[BIBLIOGRAPHY OF. THE IXODOIDEA. Qs. net 
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. Pre lim inary 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 
XLin. 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 Mus rattus in captivity 
CAMBRIDGE UNIVERSITY PRESS, FETTER LANE, LONDON 
C. F. CLAY, Manager 
