PREFACE 
The munificent gift of Mr. William Johnston has placed beside the existing 
Thompson Yates Laboratories a laboratory for Bio-Chemistry, Tropical Medicine, 
Experimental Medicine, and Comparative Pathology. These laboratories are occupied 
and directed by workers who have already collaborated in the Thompson Yates Report--. 
It has, therefore, seemed as natural as it is desirable to now issue the work emanating 
from the two sets of laboratories in a single publication. The present volume is the 
first of a new series that we hope may continue to flow from the Thompson Yates and 
Johnston Laboratories in conjunction, evidencing the utility and fruitfulness of the 
generous gift with which the public-spirited founders have equipped the University of 
their city. 
