WHY cow's MILK? 79 



containing protein in proper proportion. The pigs 

 fed upon the low protein diet may be fatter and 

 heavier, but they are weaker ^^ This is what common 

 sense would suggest, of course, in the case of babies 

 as well as that of pigs, and demonstrates very forcibly 

 how misleading the advertisements of all proprietary 

 foods are. Pictures of babies showing them to be 

 very fat, and figures showing them to be very heavy, 

 may deceive mothers and the lay mind in general; 

 but the medical man and the student of physiology 

 know that these are not the only conditions of sound 

 health. 



One of the great merits of percentage-feeding is 

 that a general knowledge of its principles will do much 

 to educate the public to a realization of the danger 

 which lurks in proprietary foods, even the very best 

 of theni. The great obstacle at present is the fact 

 that the principles have not been simplified enough 

 to make them popular. They are too complicated, 

 and involve too much computation and study, for 

 the very mothers who most need to understand and 

 practise them. It must not be forgotten that direc- 

 tions which appear simple and lucid enough to the 

 college woman will seem very complicated and diffi- 

 cult to the mind of the poor tenement mother. Quite 

 the most lucid and simple instructions for percentage- 

 feeding which I have seen fail in this vital particular. 

 The physician who can prepare a truly ssimple and 



