1106 EXPERIMENT STATION RECORD. 



of the Alimentary Tract, the second Kecent Progress in Chemistry 

 of the Proteins and its Relation to the Problems of Nutrition, and 

 the remaining three Intermediary Metabolism, taking np some 

 aspects of the intermediary metabolism of nncleoproteins and 

 purines and of the carbohydrates and also discussing the biochemical 

 functions and protective mechanisms. The lectures well illustrated 

 the very marked jjrogress in physiological chemistry within the last 

 fcAv years, and directed attention to a very large amount of material 

 which is not readiW accessible but which is of the greatest impor- 

 tance to students of animal and human nutrition. The lectures were 

 also noteworthy in that they demonstrated clearly the possibility of 

 applying ^physiological methods to the study of practical jjroblems 

 and to both the important relation of many researches along other 

 technical lines to nutrition and the important application of experi- 

 ment station problems to many investigations in medicine, pathology, 

 and other branches to which the attention of the experiment station 

 worker might not ordinarily be directed. 



Director Armsby gave the five lectures of the third week, the main 

 topics being a general survey of the chemical constituents of plants 

 and animals, the physiology of nutrition, feeding stuffs and feeding. 



The fourth week of the course was occupied by Professor Ziintz, 

 wdio gave five lectures and held two seminars. In the lectures 

 Professor Ziintz discussed particularly Muscular Action, its Different 

 Forms and its Influence on the Quantity and Quality of Metabolism; 

 The Different Forms of Internal Labor Performed by the Resting 

 Organism and their Influence on Metabolism; the Inff 'ence of In- 

 ternal and External Temperature on Metabolism, afta Aims and 

 Methods of Research Regarding the Respiratory Process (two lec- 

 tures). These lectures, which were of unusual interest, summarized 

 and discussed the results of his extended researches on metabolism in 

 men and animals, particularly the work with the respiratory quo- 

 tient carried on by means of the valuable apparatus which he has 

 devised. Professor Ziintz brought with him from Berlin the res- 

 piratory quotient apparatus and in the seminars as well as in the 

 lectures demonstrated methods of using it and also special apparatus 

 for the analyzing of respiration and other gases. His visit also 

 afforded many opportunities of discussing nutrition problems and 

 related topics in a less fornud way and was regarded as of the 

 greatest value, not only because of the material presented, but as an 

 inspiration for advanced research in nutrition. 



The special sessions devoted to conferences on general topics proved 

 of extreme interest and value, especially to those actually engaged in 

 the work of our colleges and experiment stations. These conferences 

 included addresses as follows : The Pedagogics of Agriculture, Dean 



