APPENDIX II. 163 



Treadwheel Work. 



Average external work per man per day . 119,605 mks. 

 Average nitrogen evolved per man per day 17' 7 grams. 



Weight of dry muscle corresponding to 



average nitrogen evolved per day . . 114 



Actual energy producible by the consump- 

 tion of 114 grams of dry muscle in the 



body 210,672 mks. 



Average actual energy developed in the 



body of each man, viz. 

 External work 119,605 X 2 = 239,210 mks. 

 Circulation 69,120 X 2 = 138,240 

 Eespiration 10,886 X 2 = 21,772 



399,222 |1 



In these experiments the conditions were obviously 

 very unfavourable for the comparison of the amount 

 of actual energy producible from muscle metamor- 

 phosis with the quantity of actual energy expended 

 in the performance of estimable work ; since, during 

 that portion of the twenty-four hours not occupied 

 in the actual experiment, a large amount of un- 

 estimable internal work, such as the statical activity 

 of the muscles, peristaltic motion, &c., was being 

 performed. Nevertheless, these experiments show 

 that the average actual energy developed in pro- 

 ducing work in the body of each man was nearly 

 twice as great as that which could possibly be pro- 

 duced by the whole of the nitrogenous matter 

 oxidized in the body during 24 hours. It must also 

 be remarked that the prisoners were fed upon a 

 nitrogenous diet containing six ounces of cooked 

 meat, without bone ; a diet which, as is well known, 

 would favour the production of urea. 



