Metabolism Experiment No. 70. 



87 



products, this katabolism can be determined with reasonable accuracy without 

 the introduction of the numerous errors incidental to the methods of compu- 

 tation involving the use of food and feces; for not only the errors in the 

 preparation and sampling of food and separation of feces, but other incidental 

 errors at present seemingly inevitable, creep into all methods of computation 

 in which analyses of food and feces are used. Hence it may be said that by 

 the determination of the actual katabolism from the analyses of the urine and 

 respiratory gases, a considerable portion of such errors may be eliminated. 

 The statement above regarding the errors incidental to the treatment of food 

 and feces affects, however, as fully in this as in any other method of compu- 

 tation the subsequent comparison of the absorption of food with the katabolism. 



Experiment No. 70, which continued for 3 days, immediately followed the 

 4-day fasting experiment, No. 69, and began at 7 a. m., December 20, 1904. 



The following notes from the diary of the subject, A. L. L., contain practi- 

 cally all the available information concerning his subjective impressions: 



Notes from diary. 



Dec. 20, 1904: 

 Sat on the bed most of the time; didn't 

 get to sleep until past 12 o'clock. 

 Dec. 21, 1904: 

 My eyes were in such a condition that I 

 was unable to read, so lay down 

 most of the evening. Did not go to 



sleep until about 12 and awoke at a 

 little after 3. The only real satis- 

 factory sleep I had for the rest of 

 the night was an hour just before 

 being called. 

 Dec. 22, 1904: 



Pulse. The pulse rate was taken by the subject but twice during this 

 experiment. At 8 a. m., December 21, the pulse rate per minute was 86, and 

 at 10 p. m. of the same day it was 88. 



Body movements. The records of body movements are given below. 



Movements of subject. Duration, 3 days, from Dec. 20, 7 a. m., to Dec. 23, 



7 a. m., MOJf. 



