ENEKGY FOR MAINTENANCE. 287 



intake as the probable need at this level, we may say that the body- 

 weight was maintained with approximatelj'' 1,600 calories. But the 

 evidence is not so clear as one could wish. 



With Gar the reduction in body-weight followed the usual course. 

 (See fig. 60, p. 214.) It became necessary in the early part of 

 December to give a larger diet than before, to hold the body- weight 

 at a constant level. Again, in the latter part of January, the food 

 intake was increased after a preliminary reduction to offset the in- 

 creased body- weight with which he returned to college. The body- 

 weight was thus held approximately constant with a considerably lower 

 energy intake than that in December. Probably an average of the 

 two energy intakes will not be far from the correct value for the actual 

 need, and we can say that 2,000 calories was the caloric requirement 

 of Gor at the lower weight-level. 



With Gul the body-weight was essentially constant in December 

 with practically 2,000 calories, and in the last two weeks in January 

 with 1,600 calories. (See fig. 61, p. 215.) We have reason to believe 

 that this subject, who was unusually active physically, might have 

 altered his activities somewhat between these two periods. An exact 

 measure of this difference is hard to obtain, but it would not be un- 

 reasonable to assume that an average of the energy intake for the two 

 periods represents the probable caloric requirement, namely, 1,800 

 calories. 



With Mon dietetic readjustments were made somewhat frequently, 

 owing to rather sharp falls in body-weight. (See fig. 62, p. 216.) 

 Perhaps the best level is that indicated in the latter part of January, 

 which shows that the caloric requirement of this man is not far from 

 2,000 calories. 



With Moy the body-weight was held constant in December with an 

 energy intake of approximately 2,100 calories, and again in January 

 with the available calories slightly below the December intake. 

 (See fig. 63, p. 217.) An average value of 2,000 calories will prob- 

 ably represent his caloric requirement at the lower weight-level. 



One of the most physically active subjects we had was Pea. His 

 body-weight was held at a low level over a considerable period of time 

 during December with an intake of approximately 2,500 calories. 

 (See fig. 64, p. 218.) The evidence indicates that during the latter 

 part of January and the first of February 2,300 calories sufficed for 

 this subject. We may therefore assume that 2,400 calories approxi- 

 mates his maintenance requirement. 



Pec had great difficulty in reducing to a low weight-level and the 

 dietetic readjustments were necessarily frequent. The body-weight 

 was held approximately constant from January 20 to February 3 at 

 not far from 1,600 calories, which may be taken as his maintenance 

 requirement. (See fig. 65, p. 219.) 



