18 METABOLISM AND GROWTH FROM BIRTH TO PUBERTY. 



Olin, 1915. In a study made by Olin 1 under Professor Robert 

 Tigerstedt and published in 1915, the carbon production of boys from 

 9 to 19 years old was determined. The children were taken from an 

 elementary school in Helsingfors and studied individually in 2-hour 

 experiments, usually in the morning after a light breakfast. The 

 subjects were not allowed to move about in the respiration chamber, 

 but were required to sit quiet, reading. Although approximately 200 

 children were studied, Olin's final discussion of the results is based 

 upon the data obtained with 162. subjects. These results, grouped 

 according to age, are given in table 11, which shows not only the total 

 carbon production per individual, but also the carbon production per 

 kilogram of body-weight and per square meter of body-surface. The 

 range in values for the carbon production on the basis of body-surface 

 is also included in table 11, and also the percentage distribution 

 according to age. Meeh's formula was employed in computing the 

 body-surface, the constant 12.205 being used for boys under 13 years 

 and 12.847 for those at and above that age. It will be seen that the 



TABLE 11. Carbon production of boys from 9 to 19 years of age (Olin). 



carbon production per square meter of body-surface was much larger 

 at 1 1 years of age than at any other age studied, and increased regularly 

 as the age decreased from 18 to 11 years. In comparing her data 

 with those of other investigators, Olin states that, as the experiments 

 of Magnus-Levy and Falk were made with complete muscular rest and 

 without food, these subjects were more quiet than hers, who were in 



1 Olin, Finska Lakaresiillskapets Handlingar, 1915, 57, p. 1434; also Skand. Archiv. f. Physiol., 

 1915, 34, p. 414. 



