ROYAL COLLEGE OF PHYSICIANS 
OF LONDON 
The Weber=Parkes Prize and Medals 
PRIZE OF 150 GUINEAS AND TWO SILVER MEDALS 
The competition is open to members of the Medical Profession in all countries. 
The next award will be made in 1912, and the Adjudicators have selected as the subject of the Essay for that 
occasion— 
The Influence of Mixed and Secondary Infections upon Pulmonary Tuberculosis in 
Man, and the Measures, Preventive and Curative, for dealing with them. 
“The Essay must be based on original work and observations (experimental or other) of the author, and 
must include a detailed exposition of the methods employed and their mode of application.” 
All Essays, together with any preparations made in illustration of them, must be transmitted to the Registrar 
of the College during the last week of May, 1912, in accordance with the Regulations relating thereto, copies of 
which win be forwarded from the College on application. 
The award will be made on some day previous to the 18th October in that year. 
J. A. ORMEROD, M.D., Registrar. 
Pall-mall East, S.W. 
THE JOURNAL OF 
AGRICULTURAL SCIENCE 
Edited by 
Professor R. H. BIFFEN, M.A., Cambridge, A. D. HALL, M.A., F.R.S., 
Rothamsted, and Professor T. B. WOOD, M.A., Cambridge. 
The Journal of Agricultural Science is issued in quarterly parts of about 
100 pages, with plates and figures, four parts constituting a volume. 
Volumes I, II and III now ready. In Four Parts, paper covers, 155. net 
per volume. Bound in Buckram, 18s. 6d. net per volume. 
The subscription price, payable in advance, is 15s. per volume (post free); 
single numbers 5s. net. Subscriptions may be sent to any Bookseller, or 
to Mr C. F. Clay, Manager, Cambridge University Press, Fetter Lane, 
London, E.C. 
TICKS 
A Monograph of the Ixodoidea 
By GEORGE H. E. 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) 
Now ready. PART I. THE ARGASIDAE. 
With 116 text figures and 3 plates. Royal 8vo. 5s. net 
This book will deal with the Classification, Structure and Biology of 
Ticks, the study of the group having occupied the authors for several years. 
Practically all that has been published on the subject has received adequate 
consideration. 
The book will be issued in about four parts, which will be complete in 
themselves but are designed to form a volume of about 500 pages when all 
the parts have been published. Each part will be issued in a stiff paper 
cover and will include a bibliography printed on one side of thin paper so 
that the references can be conveniently cut out and gummed on index cards. 
A complete bibliography, including all the publications cited in each part, 
will conclude the volume. 
N.B. Pa?'t II is in the press and will appear shortly. 
CAMBRIDGE UNIVERSITY PRESS, FETTER LANE, LONDON 
C. F. Clay, Manager 
