144 



Scientific Proceedings (67). 



each meal has been made and these results bear out the result for 

 the entire meal as indicated in the table below. It was thought 

 that this part of the meal might give a more exact measure of 

 hunger, its attractiveness being less subject to variation than the 

 meats and desserts. 



TABLE III. 



Per Cent. Excess Bread and Butter Eaten 



Series. on Ventilation Days. 



HI 5-2 



VII 5.7 



X 53 



XI —2.2 



XII 6.1 



These experiments seem to warrant the conclusion that there 

 are substances present in the air of an unventilated occupied room 

 (even when its temperature and humidity are controlled) which 

 in some way, and without producing conscious discomfort or 

 detectable physiological symptoms, diminish the appetite for food. 

 The effect of such an influence might in time be very important 

 and it seems possible that the observed beneficial effects of fresh 

 air may to some extent be connected with this phenomenon. 



86 (1018) 



Protective inoculation against mumps. 

 By Alfred F. Hess. 



[From the Research Laboratory, Board of Health, New York City.] 



In view of the fact that mumps confers a marked immunity on 

 the person who has had the disease, that a second attack is rare, 

 the blood of convalescents was used in a prophylactic way. Six 

 to eight c.c. of blood was injected intramuscularly in 17 cases. 

 These children were in wards where there had been cases of 

 mumps for the past month and where it continued to appear for 

 a month following these inoculations. In no case did one of the 

 inoculated children develop mumps, whereas one third to one half 

 of the non-inoculated cases developed the disease. The blood 

 was taken from children who had just recovered or had been well 

 for about ten days. 



