74 GASEOUS METABOLISM OF INFANTS. 



was therefore markedly under weight as a result of improper food and was on 

 the border line of infantile atrophy. When her food was regulated, her digestion 

 became good and she gained weight rapidly. She could be considered as being 

 in the stage of convalescence. 



Subject, M. D. Male; born February 23, 1913; birth-weight unknown. 



He entered the hospital March 8, 1913, at the age of 2 weeks, to have his 

 metabolism determined. Before coming to the hospital he had been fed partly 

 on modified milk and partly at the breast. His history was negative. He 

 was a well-developed, strong, well-nourished infant, who was normal in every 

 way. While in the hospital, he was given modified milk. His digestion 

 remained good but he did not gain in weight, presumably because he only 

 received 80 to 90 calories per kilogram of body-weight. He weighed 4.05 

 kilograms, which was about the average weight for an infant of his age. 



Subject, R. E. Male; born July 22, 1913; birth-weight, 2.27 kilograms. 



His history was negative except for the fact that he had twice had jaundice. 

 Previous to coming to the hospital, he had been fed on modified milk; his 

 digestion was normal. He entered the hospital when 4£ months old (December 

 4, 1913), for the purpose of having his metabolism determined. The physical 

 examination showed that he was well-developed and nourished, with firm mus- 

 culature and considerable subcutaneous fat, though not an excessive amount. 

 He was otherwise physically normal. The temperature varied between 36.4°C 

 and 38.0° C. (97.6° F. and 100.4° F.). On entering the hospital, he weighed 

 5.1 kilograms; as the average weight for an infant of his age is 6.5 kilograms, 

 he was 1.4 kilograms under weight, but since he weighed 1.1 kilograms less 

 than the average at birth he was only 0.3 kilogram below his expected weight. 

 He was otherwise a physically normal infant. 



Subject, E. F. Male; born September 3, 1913; birth-weight, 4.22 kilograms. 

 He had always been breast-fed and thrived in every way. He was brought 

 to the Out-Patient Department of the hospital, when 3 months old, for the 

 purpose of having his metabolism determined. The physical examination 

 showed that he was a well-developed, well-rounded infant, with a normal 

 amount of subcutaneous fat. The average weight of an infant of his age 

 (3 months) is 5.56 kilograms. At birth he was 0.8 kilogram heavier than the 

 average infant, and with normal development he would be expected to weigh 

 6.36 kilograms at this age. He actually weighed 7.05 kilograms, or approxi- 

 mately 1.5 kilograms above the average weight for this age and 0.7 kilogram 

 above what he would have weighed with normal development. He was there- 

 fore a perfectly normal infant. 



Subject, E. G. Male; born January 23, 1913; birth-weight, 3.63 kilograms. 

 For the first 8 months after birth he was breast-fed and subsequently fed on 

 modified milk. He had always thrived on this food. When 10 months old, 

 he entered the hospital on November 25, 1913, to have his metabolism deter- 

 mined and for weaning. On physical examination he was found to be a normal 

 well-developed and very well-nourished infant, with firm muscles and deep 

 layers of subcutaneous fat. He had 4 teeth. His temperature was normal. 

 His weight was 9.55 kilograms; the average weight for an infant of this age 

 (10 months) is 8.75 kilograms; he was therefore 0.8 kilogram above the average 

 weight and 0.6 kilogram above the expected weight. He may be characterized 

 as a large, fat, normal infant. 



