APPENDIX II. 165 



Military Vegetarian Prisoners at Shot Drill continued. 



Average actual energy de- 

 veloped daily in the body 

 of each man, viz., Exter- 

 nal work, 96,316 X 2 = 192,632 mks. 



Internal work .... 160,012 



352,644 mks. 



Owing chiefly to the vegetable diet of these 

 prisoners, the result is more conclusive than that 

 obtained upon the tread wheel, the amount of work 

 actually performed being considerably more than 

 twice as great as that which could possibly be 

 obtained through the muscle metamorphosis occur- 

 ring in the bodies of the prisoners. 



PLAYFAIR'S DETERMINATIONS. 



Sthly. In these determinations the number 109,496 

 metrekilograms was obtained as the average amount 

 of daily work performed by pedestrians, pile-drivers, 

 porters, paviours, &c. ; but, as the amount, of muscle 

 consumption is calculated from the nitrogen taken 

 in the food, the conditions are as unfavourable as 

 possible with regard to the point the speaker was 

 seeking to establish; for it is here assumed, not 

 only that all the nitrogen taken in the food enters 

 the blood, but also that it is converted into muscle, 

 and is afterwards oxidized to carbonic acid, water, 

 and urea. 



