62 VITALITY AND EFFICIENCY WITH RESTRICTED DIET. 



October 16, Squad A. Topped milk, i. e., part of cream removed, used on this 

 date and subsequently; whole milk used previous to this date. 



October 17-20, inclusive, Squad A. Third digestion period for collection of 

 feces. 



October 19, Squad A. First bicycle ergometer experiments made by Professor 

 Johnson; made on Mondays and Fridays throughout research with 

 Squad A. 



October 24, Squad A. Last day Pre ate at training table. 



October 2Jf., Squad B. First bicycle ergometer experiments with Professor John- 

 son; made on Wednesdays with Squad B throughout research. 



October 27, Squad A. Came to Boston; supper at restaurant. Psychological 

 tests previously described, also strength of grip. Kon served in 

 place of Pre. Second clinical examination, Dr. Goodall (first for 

 Kon); second profile photographs (first for Kon); first Du Bois 

 body-surface measurements for Kon. Third experiment in group 

 respiration chamber (11 men only, i. e., without Kon). 



October 28, Squad A. In Boston; at Laboratory part of morning. Meals 

 uncontrolled on this date, except for breakfast at Laboratory. First 

 Sunday morning program for psychological measurements; indi- 

 vidual measurements as follows: 

 Changes in pulse-rate occasioned by short periods of exertion. 

 Reaction time for turning the eye to a new point of regard. 

 Speed of the eye movement. 



Two finger movement records, like those taken in evening. 

 Strength of grip. 



October 30, Squad A. Kon at training table for first time. 



Oct. 31 to Nov. 3, inclusive, Squad A. Fourth digestion period for collection of 

 feces. 



November 3, Squad A. First use of currant jelly to replace more or less butter 

 in diet. 



November 3, Squad B. Came to Boston. Evening psychological tests. McM 

 served as subject in place of Kon, transferred to Squad A. Second 

 experiment in group respiration chamber. 



November 4, Squad B. In Boston; at Laboratory part of morning. First 

 Sunday morning program of psychological measurements. (See 

 Oct. 28 for outUne.) 



November 10, Squad A. Came to Boston; dinner and supper at restaurant 

 (Pea had dinner in Springfield). Regular evening psychological 

 tests. Third clinical examination, Dr. Goodall. Individual 5- 

 minute practice walking on treadmill in preparation for subsequent 

 walking experiments. Questioned in evening regarding intro- 

 spection on diet, hunger pains, physical endurance, etc. Fourth 

 experiment in group respiration chamber. 



November 11, Squad A. In Boston; at Laboratory part of morning. First 

 rectal temperature measurements, with subject lying in group respira- 

 tion chamber after night experiment. Regular morning program 

 psychological measurements. Meals uncontrolled on this day except 

 for breakfast at Laboratory. 



Nov. 12 to 17, inclusive. Squad A. Fifth digestion period for collection of feces. 



November 13, Squad A. Use of bran muffins begun. 



November 17, Squad B. Came to Boston ; supper at restaurant. Regular even- 

 ing psychological tests. Individual 5-minute practice walking on 

 treadmill. Third experiment in group respiration chamber. 



November 18, Squad B. In Boston; at Laboratory part of morning. First 

 rectal temperature measurements, with subject lying in group respira- 



