238 STORRS AGRICULTURAL EXPERIMENT STATION. 



and J. F. S. was that of the chemical laboratory, and with J. 

 C. W. was that of a college student. It was not arduous for 

 any of them, but involved more or less walking or standing, so 

 that the amount of muscular exercise was greater than during 

 the otherwise similar experiments within the calorimeter. In 

 these the total amount of work done in a day would be at 

 largest equivalent to what might be understood as that of a 

 man at " light muscular work." 



The exercise of the subjects during the days preliminary to 

 the work experiments consisted of that of their usual occupa- 

 tion and in addition the labor involved in pedalling the sta- 

 tionary bicycle or a " home trainer ' ' a certain length of time 

 within doors, or in long walks or bicycle rides over country 

 roads. The total amount of energ^^ expended daily during 

 these experiments would doubtless be equivalent to that of a 

 man at " light to moderate muscular work." 



In the work experiments within the calorimeter the subjects 

 performed all the duties required of them in the rest experi- 

 ments, and besides spent eight hours each day operating a 

 bicycle arranged as an ergometer, for measuring the amount 

 of work done. This was perhaps nearly equivalent to that of 

 a man at " hard work." In the last day of the last experiment 

 (No. 308) included in this report the subject, J. C. W., 

 worked much harder than ordinarily and continued the work 

 for sixteen hours. 



The figures in Table 134 are arranged so that the results 

 with each subject during the different kinds of experiment 

 may be easily compared. From these it will be observed that 

 in some cases, with the same subject, the coefficients of avail- 

 ability are larger where the work is less, and in other cases 

 they are smaller. The differences between the experiments 

 with different amounts of work, however, are generally no 

 larger than those between different experiments with the same 

 quantity of exercise. Compare, for instance, the results in 

 metabolism experiment No. 9 with those in the period pre- 

 liminary to No. 9, and then compare the results in experiments 

 Nos. 9 and 13 in the preliminary period, or Nos. 5 and 13 in 



