BED CALORIMETER AND TENSION-EQUALIZER UNIT. 91 



Pulse-rate varied in first calorimeter period from 68 to 74 and in second period 

 from 73 to 85. Only a few records of pulse-rate in experiments with tension- 

 equalizer unit. No records of respiration in calorimeter periods; respiration 

 with tension-equalizer unit uniform. 



M. A. M., March 20, 1912. — Bed calorimeter, three 45-minute periods, 

 one 1-hour period; tension-equalizer unit, four 11- to 15-minute periods; pre- 

 liminary period, 1 hour 20 minutes. Mouthpiece used with tension-equalizer 

 unit. Subject awake in the calorimeter; quiet with tension-equalizer unit. 

 Pulse-rate uniform in calorimeter periods; variable with tension-equalizer 

 unit. Respiration-rate not taken in calorimeter; exceptionally uniform with 

 tension-equalizer unit. 



M. A. M., March 22, 1912. — Tension-equalizer unit, five 15-minute periods; 

 bed calorimeter, three 1-hour periods ; preliminary period, 37 minutes. Mouth- 

 piece used with tension-equalizer unit. Subject quiet and awake throughout 

 the experiment. At 9 h 30 m a. m. he arose and urinated, lying down again 

 at 9 h 32 m a. m. Pulse- and respiration-rates very uniform in periods with the 

 tension-equalizer unit. Pulse-rate fairly uniform in bed calorimeter, but no 

 respiration records taken. 



E. P. C, April 6, 1912. — Tension-equalizer unit, four 13- to 15-minute 

 periods; bed calorimeter, two 1-hour periods. Mouthpiece used with tension- 

 equalizer unit. Subject somewhat drowsy at times with tension-equalizer 

 unit; quiet in first period with calorimeter, but slightly restless in second 

 period. Pulse-rate for most part regular. Depth of respiration irregular with 

 tension-equalizer unit; no records of respiration made with bed calorimeter. 



J. E. P., April 6, 1912. — Bed calorimeter, two 1-hour periods; tension- 

 equalizer unit, four 15-minute periods; preliminary period, 1 hour 7 minutes. 

 Subject very quiet in calorimeter and quiet with tension-equalizer unit. 

 Pulse-rate uniform in bed calorimeter and fairly uniform in periods with 

 tension-equalizer unit. No respiration records taken with bed calorimeter; 

 rate very regular with tension-equalizer unit. 



J. E. F., April 8, 1912. — Bed calorimeter, two 1-hour periods; tension- 

 equalizer unit, three 13-minute periods; preliminary period, 1 hour 7 minutes. 

 Experiments carried out in afternoon. Subject very quiet in calorimeter. 

 Pulse-rate for the most part uniform in calorimeter; somewhat variable with 

 tension-equalizer unit. No respiration records taken with calorimeter; 

 rate uniform with tension-equalizer unit. 



DISCUSSION OF RESULTS. 



The results of all of the comparisons made with the bed calorimeter 

 and the tension-equalizer unit are given in table 12. The general 

 averages for the two apparatus show a close agreement in the respira- 

 tory exchange. The carbon dioxide with the bed calorimeter is 190 

 c.c. per minute and with the tension-equalizer unit 185 c.c. per minute. 

 The figures for the oxygen consumption show a similar agreement, being 

 223 c.c. with the bed calorimeter and 227 c.c. with the respiration 

 apparatus. The respiratory quotient is slightly higher with the bed 

 calorimeter than with the respiration apparatus, i. e., 0.850 against 

 0.815. The pulse-rate is practically the same with both apparatus, 

 or 58.5 and 59.5 respectively; the respiration-rate is slightly higher with 

 the bed calorimeter, the average result for that apparatus being 15.0 

 as compared with 13.2 for the tension-equalizer unit. 



