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PREFACE. 
The two previous volumes of Studies from the Institute of Medical 
^ Research were each on a special subject, Malaria and Beri-Beri 
- respectively. 
- In this ’ the third volume, the plan of in each volume treating a separate 
subject has been abandoned, both because it has not been found practicable 
to so complete the study of any subject as to attain finality, and also because 
it has been necessary to make a partial study of so many subjects connected 
with the Public Health. 
Many of these investigations are merely preliminary, but enough has 
been done to show that the local study of local conditions is a necessity 
for economically dealing with sanitary questions. 
The application of general principles on lines advantageously adopted 
elsewhere requires for local needs much modification, and unless the 
knowledge is obtained of local conditions waste of money and inefficient 
sanitation will occur in the future as they have done in the past. 
The present volume is divided into four numbers :_ 
No. i deals with observations made on the commoner diseases 
of men and animals. 
No. 2. A preliminary report on the natural waters and the 
effects of methods for purification adopted. 
No. 3 gives the results of an enquiry into the Culicida? of Malaya. 
No. 4 is an account of observations made on the epidemics of 
Rinderpest in Selangor in the last eighteen months, with an account 
of clinical characteristics of the disease. 
An extra number on Beri-Beri will, it is hoped, be published later. 
C. W. DANIELS, 
Director, Institute for Medical Research , F.M.S. 
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