132 



FOOD INGESTION AND ENERGY TRANSFORMATIONS. 



TABLE 59. T. M. C., January 7, 1911. Sitting. 



Chewing gum. 1 Nitrogen in urine, 0.19 gram 2 per 45 minutes. 



Basal values per 46 minutes (January 7, 1911) : CO2, 14 grams; Ch, 12.5 grams; heat, 1 42 cals. ; res- 

 piratory quotient, 0.80. 



'Amount not recorded. 



'Sample included amount for about 5j hours, without food, preceding and following th 



periods of chewing. 



'Heat eliminated corrected for change in body-weight, but not for change in body- temperature. 

 'Computed from result for actual period of 45 minutes by deducting basal value equivalent 



to 7 minutes at beginning of experiment when subject was not chewing. 



RESPIRATION EXPERIMENTS. 



T. M. C., 12 noon to 12 h 50 m p. m., December 17, 1910. Light breakfast at 

 7 h 30 m a. m. (two small slices toasted and buttered white bread and cupful of 

 coffee, with cream and sugar). Rate of chewing, 68 to 86 per minute in first 

 period, 74 to 87 per minute in second period ; difficult for subject to keep mouth 

 closed when chewing. 



J. J. C.,9^27 m a. m. to I h 55 m p. m., January 4, 1911. 64.6 kilograms. Head 

 confined in wooden head-rest to prevent its moving out of position during 

 sleep. Slept a few minutes in first basal period and nearly all of third basal 

 period. Adhesive plaster over lips in basal periods. Rate of chewing, 80 

 to 92 per minute; in second chewing period, stopped chewing once and opened 

 mouth for about 3 seconds. Nitrogen in urine per hour, 8 a. m. to 5 h 10 m p. m., 

 0.37 gram. 



V. G., S h 3 m a. m. to I h 30 m p. m., January o, 1911. 56 kilograms. Asleep 

 in second basal period; second chewing period shortened to 7 minutes, as 

 subject was dizzy and had some difficulty in breathing; also dizzy last two 

 minutes of third chewing and at end of fourth chewing periods. Rate of 

 chewing, 46 to 75 per minute. Urinated at 7 h 50 m a. m. and urinated and defe- 

 cated at 2 h 40 m p. m. Nitrogen in urine per hour, 7 h 50 m a. m. to 2 h 40 m p. m., 

 0.33 gram. 



F. G. B., S ]t W" a. m. to 10*0;') a. m., January 9, 1911. 83.5 kilograms.- 

 Urinated at 7 h 44 m a, in., 8 h 28 In a. m., and 9 h 24 m a. m. Rate of chewing. 

 03 to 103 per minute in first chewing period, 100 to 104 per minute in second 

 chewing period. 



F. G. B., ll } US m a. m. to ll*4o m a. m., May 5, 1911. Chewing periods fol- 

 lowed water-drinking experiment of same date (see table 79, page 147); for 

 data regarding basal period, see statistics for that experiment. Chewed 

 with mouth closed; rate of chewing, 90 to 95 per minute in first period and 112 

 to 114 per minute in second period. Nitrogen in urine per hour, 10 h 54 m a. m. 

 to Il h 47 m a. m., 0.41 gram. 



V. G., Il h 26 m a. m. to 12*31 p. m., January 31, 1911. 54.9 kilograms.- 

 Chcwing periods followed water-drinking experiment of same date (see table 



