136 VITALITY AND EFFICIENCY WITH RESTRICTED DIET. 



Table 7. — Calculation of metabolism experiment with Gul walking in treadmill chamber, 



Feb. 3, 1918. 

 Calculationt of Carbon Dioxide Produced. 

 (a) Carbon dioxide present at start of period: 



Liters. 



Apparent volume of chamber 2,419 



Correction for spirometer, 75 mm. X21.5 c.c 1 .61 



2,420.61 

 Volume of subject 64 . 00 



Total volume 2,356.61 



Log. volume, 2,356.61 =3.37229 



" temperature 21.0 reduced to 0° C 9.96776-10 



" barometer, corr.i 755.73 reduced to 760 mm. . . 9.99756-10 



corr. volume 3.33761 = 2, 175.8 liters. 



per cent CO2 at start 0.143 7 . 15534-10 



" C02atstart 0.49295= 3.111iter3. 



(6) Carbon dioxide present at end of period: 



Liters. 



Apparent volume of chamber 2,419 



Correction for spirometer, 116 mm. X21.5 2.49 



2,421.49 

 Volume of subject 64 . 00 



Total volume 2,357.49 



Log. volume, 2,357.49 =3.37245 



" temperature 20.56 reduced to 0° C 9 . 96841-10 



" barometer, corr.» 755.08 reduced to 760 mm. . . 9 . 99718-10 



corr. volume 3.33804= 2,177.9 liters. 



per cent CO2, 0.706 7 . 84880-10 



CO2 at end 1.18684= 15.381iter3. 



Litera. 



Vol. CO2 at end 15.38 



Vol. CO2 at start 3.11 



Vol. CO2 produced 12 . 27 



Duration of period, 20 minutes. CO2 produced per minute, 614 c.c. 



Calculation of Oxygen Consumed. 

 (a) Oxygen present at start of period: 



Total per cent CO2 in chamber at start 0. 143 



Assumed per cent CO 2 in original (outdoor) air in chamber 030 



Per cent CO2 produced at expense of the oxygen originally 



present in chamber 113 



T, . J c -J. per cent CO2 produced 0.113 „ ,.r, 



Per cent oxygen deficit = - = = 0. 140 



R. Q. (assumed) 0.81 



Per cent of O2 in outdoor COa-containing air ^29 . 932 



Per cent of O2 deficit in chamber air . 140 



Apparent per cent of O2 in chamber air 20 . 792 



100 volumes of the air originally in the chamber, assumed to be of outdoor composition, would 

 consist of20.932 volumes O2; 0.031 volume CO2; and 79.037 volumes N2; total, 100.000 volumes; 

 but since there has been a diminution in the volume in the chamber due to the fact that more 



^ Observed barometer minus corrections for barometer temperature (brass scale) and aqueous 



tension. 

 ^ The oxygen in the air on a C02-free basis = 20.938 per cent; carbon dioxide = 0.031 per cent. 



(Benedict, Carnegie Inst. Wash. Pub. No. 166, 1912, p. 114.) 



