EEMEDIAL THEORIES AND EXPERIMENTS 233 



a saving of more than 20 per cent of the total number 

 of children." Such figures as these do not need to 

 be enforced by weighty argument. They are elo- 

 quent and impressive preachers of a social lesson of 

 vast significance, and, above all, of sublime inspira- 

 tion to all who seek to save the children of the 

 nation from needless suffering and death. 



The investigations conducted by Park and Holt 

 have been so often described, and the detailed results 

 are so accessible to the general reader," that it is un- 

 necessary to do more than summarize them here. 

 The object of the investigation was to study the 

 manner of feeding infants in the tenements and its 

 relation to infant mortality. Ten physicians, work- 

 ing under the direction of Drs. Park and Holt, dur- 

 ing the summers of 1901-1902 and the intervening 

 winter, kept a number of children under close obser- 

 vation for an average period of three months. The 

 total number of children observed was 632, of which 

 number 340 were six months old or under, 265 rang- 

 ing from seven to twelve months, and 47 a little over 

 twelve months. Care was taken to select perfectly 

 healthy children to begin with, and each child was 

 visited by a physician twice every week. The weight 

 of each child was taken at regular intervals and other 

 physical conditions noted. It need scarcely be said 

 that this medical inspection of the children, and the 

 special interest in their children which the doctors' 



