Eelations between Factors of Metabolism. 



207 



merits with one subject gave 100 : 106, 106, 120, and 111, respectively; 2 experi- 

 ments with a second subject gave 100 : 121 and 97, respectively. 



Somewhat later Likhatscheff and Avroroff l found on a day " without fever " 

 with a 17-year old girl, suffering from intermittent malarial fever, that the 

 ratio of carbon dioxide eliminated to water vaporized in 24 hours was 100 : 124. 



In a number of researches made with the respiration chamber in the Hy- 

 gienic Institute in Berlin under Rubner's direction, both carbon-dioxide elimi- 

 nation and water vaporized have been determined. Many of the experiments 

 were made at different temperatures and with marked variations in the relative 

 humidity. Those of the experiments that are more strictly comparable with the 

 conditions of the experiments presented in this report are given herewith. 



Table 86. Ratio between carbon dioxide eliminated and water 

 vaporized, in experiments reported by Sonden and Tigerstedt. 



Wolpert 2 recognizing the variations in the water vaporized dependent upon 

 the temperature and relative humidity, calculated in rest experiments that the 

 relationship of carbon-dioxide elimination to water vaporized was as 100 : 60 at 

 a temperature of 17.3 C. and 61 per cent relative humidity; 100: 100 at a 

 temperature of 20.4 C. and a relative humidity of 20 per cent; and 100: 215 

 at a temperature of 25.7 C. and a relative humidity of 26 per cent. During 

 sleep he found 100:130 at 19 C. and 63 per cent relative humidity, and 

 100: 230 at 21.1 C. and 23 per cent relative humidity. 



With people representing 6 different trades, Wolpert found a relationship 

 between carbon dioxide eliminated and water vaporized during rest as f ollows : 



Woman shoemaker 100: 90 Draftsman 100 : 175 



Writer 100 : 105 Lithographer 100 : 175 



Tailor 100 : 170 Laundress 100 : 230 



In experiments on himself at rest he found as an average 100: 125. Lascht- 

 schenko 3 found with a subject weighing 71 kilograms at a temperature of 17 

 to 19 C. the ratios of 6 experiments were as 100 : 108, 97, 78, 106, 93, and 128. 



Rubner* found with a subject weighing 71 kilos a ratio of carbon dioxide 

 eliminated to water vaporized of 100 : 92. With a subject weighing 58 kilos, at 

 a temperature of 15 to 25 C, an average ratio of 100 : 85 was found. 



1 Likhatscheff and Avroroff, loc. cit. 



2 Wolpert, Archiv f. Hygiene, 1896, 26, p. 62. 



3 Laschtschenko, Archiv f . Hygiene, 1898, 33, p. 148. 



4 Rubner, Archiv f. Hygiene, 1900, 38, p. 133. 



