PROGRAM OF RESEARCH. 61 



September 24- General call for volunteers. 

 September 25. Unpacking and installation of apparatus. 

 September 27, Squad A. First experiments in Springfield with respiratory- 

 valve apparatus and portable respiration apparatus and first records 

 of pulse-rate; first collection of urine. 

 September 29, Squad A. Came to Boston (Kon excepted). Came to Labora- 

 tory immediately after prescribed evening meal and took psycholog- 

 ical tests for first time in following order: 

 Group tests in library: 



Accuracy in tracing between irregular parallel lines. 

 Memory span for 4-letter English words. 

 Addition of one-place numbers for a period of 10 minutes. 

 Discrimination for specified number groups on a printed page. 

 Discrimination for the pitch of tone. 

 Individual tests in psychological laboratory and adjoining rooms: 

 Sensory threshold for electric shock. 



Latency, amplitude, and refractory period of the patellar reflex. 

 Speed of the finger movements. 

 Efficiency in traversing a right-angle maze. 

 Efficiency in performing certain clerical tasks. 

 In addition to psychological measurements, other measurements were : First 

 Du Bois surface measurements; first profile photographs; first experi- 

 ment in group respiration chamber. 

 September 30, Squad A. In Boston at Laboratory part of morning. First 



record of body-weight. 

 October 1 to 3, inclusive. Squad A. Normal diet at training table; food portions 

 weighed, sampled, and samples analyzed. First digestion period for 

 collection of feces. (Pec not included; he was always irregular in 

 these periods.) 

 October 2, Squad A. Physical examination, Dr. Chapin (Can, Gul, and Kon 



excepted). 

 October 4, Squad A. First reduction in diet. 

 October 6, Squad A. Pedometers used from this date to end of experiment. 



First use of bran in diet. 

 October 6, Squad B. Came to Boston. At Laboratory immediately after 

 prescribed evening meal and took psychological experiments as 

 outlined for Squad A on September 29. Kon and Mac included 

 in these measurements, but McM, Kim, and Sch not included. First 

 experiment in group respiration chamber. 

 October 7, Squad B. First record of body-weight (McM, Kim, and Sch 



excepted). 

 October 8-11, inclusive, Squad A. Second digestion period for collection of 



feces. 

 October 9, Squad A. Affidavit signed. 

 October 10, Squad A. Began using margarine instead of butter for some of the 



meals. 

 October 13, Squad A. Came to Boston; supper at restaurant. At Laboratory 

 after evening meal ; second series psychological tests. Added to tests : 

 Sensory threshold for visual efficiency (acuity). 

 Reaction time for speaking 4-letter words. 



Continuous discrimination and reaction in finding serial numbers. 

 First clinical examination. Dr. Goodall; second experiment in group 

 respiration chamber. 

 October 14, Squad A. In Boston; at Laboratory part of morning. Meals 

 uncontrolled on this date, except for breakfast at Laboratory. 



