188 Prof. Frankland on the Origin of Muscular Power, 



Actual Energy developed by 1 grm. of each substance when 

 consumed in the body. 



Name of substance (dried at 

 100° C). 



Heat-units. 

 (Mean.) 



Metrekilogs. 

 of force. 

 (Mean.) 



Beef muscle purified by ether ... 

 Purified albumen 



4368 

 4263 



1848 

 1803 



Interpolating the data thus obtained into the results of Fick 

 and Wislicenus's experiments, let us now compare the amount 

 of measured and calculated work performed by each of the expe- 

 rimenters during the ascent of the Faulhorn, with the actual 

 energy capable of being developed by the maximum amount of 

 muscle .that could have been consumed in their bodies, this 

 amount being represented by the total quantity of nitrogen ex- 

 creted in each case during the ascent and for six hours afterwards. 





Fick. 



Wislicenus. 



Weight of dry muscle consumed 



37'17 grms. 



37'00 grms. 



Actual energy capable of being pro-1 

 ducedby the consumption of 37*17 1 

 and 3700 grms. of dry muscle in j 

 the body J 



68,690 

 metrekilogs. 



68,376 

 metrekilogs. 



Measured work performed in the! 

 ascent (external work) J 



Calculated circulatory and respira- 1 

 tory work performed during the I 

 ascent (internal work) J 



129,096 



metrekilogs. 



30,541 



metrekilogs. 



148,656 

 metrekilogs. 



35,631 



metrekilogs. 



Total ascertainable work performed . 



f 159,637 

 \ metrekilogs. 



184,287 

 metrekilogs. 



The actual energy capable of being produced by the consump- 

 tion of 37*17 and 37*00 grms. of dry muscle in the body was 

 estimated by Fick and Wislicenus at 106,250 and 105,825 me- 

 trekilogs. 



The experimental determination of the actual energy deve- 

 loped by muscle-oxidation renders it now abundantly evident 

 that the muscular power expended by these gentlemen in the 

 ascent of the Faulhorn could not be exclusively derived from the 

 oxidation either of their muscles or of other nitrogenous consti- 

 tuents of their bodies, since the maximum of power capable of 

 being derived from this source, even under very favourable as- 

 sumptions, is in both cases less than one-half of the work actually 



