Experimental Plant. 



hi 



In studying this question we found that certain anesthetics 

 increase the antitryptic action of the blood sometimes as high as 

 ioo per cent, and more. Although there might be some other 

 relation, this increase of antitrypsin in the blood alone is sufficient 

 to stop the activity of proteolytic enzyme and thus to avert the 

 shock. As the animal recovers, the amount of antitrypsin is 

 gradually coming down to normal and accordingly proteolytic 

 enzyme is able to exert its action only in part, thus extending the 

 process in duration at the expense of severity. 



68 (iooo) 



The experimental plant of the New York State Commission on 



Ventilation. 



By C.-E. A. Winslow. 



[From the New York State Commission on Ventilation.] 



The physiological investigations of the last twenty years have 

 indicated that the ordinarily observed results produced by the 

 air of crowded unventilated rooms are due to thermal rather than 

 chemical conditions, high room temperatures producing serious 

 physiological derangements, while the chemical constituents of the 

 air of such rooms appear not to exert any measurable effects. 

 For the further study of the reactions of the body to moderately 

 high room temperatures, and for a more exhaustive investigation 

 of possibly undetected chemical influences, the New York State 

 Commission on Ventilation has equipped an experimental plant in 

 rooms courteously placed at its disposal by the trustees of the 

 College of the City of New York. 



Since the effects to be observed would naturally be slight, it 

 was necessary to provide a plant on a large enough scale for the 

 observation of a number of subjects over considerable periods of 

 time. On the other hand, since we were dealing not with calori- 

 meter experiments but merely with the effects of ordinary atmo- 

 spheric conditions upon the human body, it was not essential that 

 these atmospheric conditions should be regulated within closer 

 limits than those attainable under the best practical conditions. 



The observation room of the plant is ten feet by fourteen feet 



