400 PRINCIPLES OF ANIMAL NUTRITION. 
81.5 parts of dextrose. Laulanié* computes that 100 parts of 
fat, carbohydrates, and albumin would produce the following 
amounts of dextrose: 
100 parts of fat produce............ 161 parts of dextrose 
100 “. ‘ starch produce. ....... 110 “ “ « 
100 “ “sucrose produce. ...... 105 
100 “ “ albumin produce....... BQ 86 fe 
The corresponding isoglycosic values would be as follows, 
Rubner’s isodynamic values being added for comparison: 
80 ic: | Isogl: i 
Taents. | Weighte. 
Pa bis siesta decaredee ee owe 25S 100 100 
Searchis as cs aisjeies eaacere gon ecs 229 146 
Cane-sugar .........+-4. 235 153 
Dextrose ..........+-25- 255 161 
Lean meat ............-. 235 
Extracted meat ......... 213 
Albumin..............-. dese 201 
It is evident that the chief point of difference is the relative 
value of fat and carbohydrates. 
Experiments on Maintenance.—As regards the relative values of 
the several nutrients in a maintenance ration the above conclusions 
are in part based on theoretical considerations and in part are de- 
ductions from the experiments upon the influence of work on the 
- respiratory quotient and upon the nature of the non-nitrogenous 
material metabolized which were considered in Chapter VI, pp. 
211 to 225. Contejean,t however, has made direct experiments 
upon the replacement values of fat and carbohydrates. 
His experiments were made with dogs. In the first series the 
animal, weighing about 20 kgs., received a basal ration of 500 grams 
of meat (1000 in the first period), estimated to be ample to main- 
tain nitrogen equilibrium. To this were added in the several 
periods varying amounts of lard, sugar, and gelatin. The live 
weight of the animal was taken daily at the same hour and under 
uniform conditions, and the urinary nitrogen was determined. 
No mention is made of the fecal nitrogen. The total heat produc- 
* Energetique musculaire, p. 101. 
7 Archives de Physiol., 1896, p. 803. 
