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MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



The summary of the calorimetric measurements during this series of experiments is shown in 

 Table LV. The results of experiments Nos. 23 and 24 are summarized by days, and those for 

 experiment No. 22, in which alcohol formed a part of the diet, are summarized by 6-hour periods. 



Table LV. — Summary of calorimetric measurements — metabolism experiments Nbs. 22-24- 



The determinations of alcohol in urine and freezer water, and of reducing material reckoned 

 as alcohol in the ventilating air current, were made in the usual manner. The results are shown 

 in Table LVI. It will be noticed that there was a considerable amount of reducing material in 

 the air and urine on days in which alcohol did not form a part of the diet, equivalent on an 

 average to 0.37 of a gram of alcohol per day. It is of course possible that this reducing material 

 may have been alcohol that had been retained in the system and was slowly eliminated. This, 

 however, seems improbable, especially in view of the fact that the results are no larger than have 

 been found in later experiments in the ventilating air current when alcohol had not formed a part 

 of the diet for a long period. To be strictly accurate, the total amounts of alcohol excreted on 

 the different days of experiment No. 22 should be reduced by a certain amount representing the 

 average excretion of reducing material not alcohol. Inasmuch, however, as this was a matter 

 still under investigation no such correction was made in this experiment, and the results were 

 c< imputed on the supposition that all the reducing material in the air current was alcohol, although 

 from later investigations it seems quite certain that this is wrong. The error, however, would 

 probably not exceed 0.3 or 0.4 of a gram of alcohol, corresponding to 2 or 3 calories of energy 

 per day. 



