Prof. Frankland on the Origin of Muscular Power. 191 



Treadwheel Work. 

 Average external work per man perl nQ metrekilog8 . 



day . J 



Average nitrogen evolved per man \ n«- 



per day J ° 



Weight of dry muscle corresponding! , ,^ 



to average nitrogen evolved per day J " 



Actual energy producible by the con-~l 



sumption of 114grms. dry muscle >210,672 metrekilogs. 



in the body J 



Average actual energy developed in the body of each man, viz. 

 External work . . 119,605 x 2 = 239,210 metrekilogs. 

 Circulation . . . 69,120x2 = 138,240 

 Respiration . . . 10,886x2= 21,772 



399,222 

 In these experiments the conditions were obviously very un- 

 favourable for the comparison of the amount of actual energy 

 producible from muscle-metamorphosis 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 unestimable 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 producing work in 

 the body of each man was nearly twice as great as that which 

 could possibly be produced by the whole of the nitrogenous matter 

 oxidized in the body during twenty-four hours. It must also be 

 remarked that the prisoners were fed upon a nitrogenous diet 

 containing 6 ounces of cooked meat without bone — a diet which, 

 as is well known, would favour the production of urea. 



Shot-drill Experiments. 



The men employed for these experiments were fed exclusively 

 upon a vegetable diet, and they consequently secreted a consi- 

 derably smaller amount of nitrogen than the flesh-eaters engaged 

 in the treadwheel work ; the other conditions were, however, 

 equally unfavourable for showing the excess of work performed 

 over the amount derivable from muscle-metamorphosis. 



In shot drill each man lifts a 32-lb. shot from a tressel to his 

 breast, a height of 3 feet; he then carries it a distance of 9 feet 

 and lays it down on a similar support, returning unloaded. Six 

 of these double journeys occupy one minute. The men were daily 



engaged with 



Shot drill .... 3 hours. 

 Ordinary drill . . . IJ „ 

 Oakum-picking . . . 3^ „ 



