192 Prof. Frankland on the Origin of Muscular Power, 



The total average daily external work was estimated by Haughton 

 at 96,316 metrekilogs. per man. The following is a condensed 

 summary of the results of these experiments : — 



} 



[Haughton.) 



96*316 metrekilogs. 



12*1 arms. 



77-9 „ 



143,950 metrekilogs. 

 body of each 



Military Vegetarian Prisoners at Shot Drill. 



Average external work per man per 

 day 



Average nitrogen evolved per man 1 

 per day J 



Weight of dry muscle corresponding \ 

 to average nitrogen evolved per day J 



Actual energy producible by the con- 

 sumption of 77*9 grms. of dry 

 muscle in the body .... 



Average actual energy developed daily in the 

 man, viz. 



External work 96,316 x 2 . . . =192,632 metrekilogs. 



Internal work = 160,012 „ 



352,644 



Owing chiefly to the vegetable diet of these prisoners, this 



result is more conclusive than that obtained upon the treadwheel, 



the amount of work actually performed being considerably more 



than twice as great as that which could possibly be obtained 



through the muscle-metamorphosis occurring in the bodies of the 



prisoners. 



Playfair s Determinations. 



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 T am 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 after- 

 wards oxidized to carbonic acid, water, and urea. 



The following are the results, expressed as in the previous 



Hard-worked Labourer (Playfair) . 





Work per- 

 formed. 



Actual energy 

 required. 



Daily labour (external work).... 



metrekilogs. 



109,496 



80,006 



metrekilogs. 

 218,992 

 160,012 





189,502 



379,004 



Actual energy capable of being produced from 5 - 5oz. (155*92 grms.) metrekils. 

 of flesh -formers contained in the daily food of the labourer 288,140 



