From the Physiological Laboratory, Edinburgh University. 



The influence of a meat diet on the kidneys. 



By 

 Chalmers Watson. 



With histological report. 



By 

 G. Lyon, 



And a report on the nitrogen excretion. 



By 



Andrew Hunter. 



(With Plate VI.) 



In this paper I present the results obtained in one part of an 

 investigation which was begun with a two-fold object, viz: 



a) To ascertain the influence of various diets on growth and 

 nutrition, rats being the subject of observation: and 



h) To determine what structural changes, if any, were associated 

 with the use of these diets. 



The results of the first part of this investigation have already 

 been published.^) In this and subsequent papers attention will be 

 directed to the influence of the diets on the structure of the organs 

 and tissues. In an investigation of this kind, which necessitates an 

 examination of the organs and tissues of a large number of animals, 

 it is obviously an advantage that a number of investigators should 

 take part in the research. This plan has been adopted, and accor- 



') Journal of Physiology Vol. XXXIV Nos. 1 & 2. March 13, 1906. 



