THE NEW EARTH 



In another room in the same building, three 

 times a day, six young men met to eat their 

 meals. The food given them was under test. 

 It was weighed and measured with the utmost 

 care. One young man had one kind of meal, 

 that is, a certain ration which he kept through 

 the test; the others, other rations. Every par- 

 ticle of waste was accounted for, so that the 

 actual value of each food was determined. It 

 was quite as though an engine was being fed 

 a certain amount of coal and a careful record 

 kept of all the refuse, as well as of all the work 

 the coal did in the engine. The most careful 

 and painstaking records were kept during the 

 week the foods were under test, and, at the 

 end of that time, after having made careful 

 laboratory tests of the value of the foods, 

 determined by artificial digestion experiments, 

 the professor in charge was able to come to a 

 very clear and accurate statement of just what 

 the different foods were worth, and also to 

 determine the relative value of the different 

 styles of rations. 



Still different and more extensive is the test 

 made in the respiration calorimeter. In this 

 apparatus the small cavity in the steel bomb 



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