?: AND MAN. r,.>; 



ok up this tnbjeol rabeecji >;id ind<-; 



1. ut all that has been done hitherto" enhances instead of 

 dim! :lu- merits of or. 



siiler the vigor of his reasoning. "Beyond the 

 power of generating internal h.-at, the animal org 

 can generate heut external to itself. A blacksmith by 

 ;:rring can warm a nail, and a savage by frictio: 



' its point of ignit -.less, then, we 



that the animal body 



cannot create heat out of noth are drivm to tin- 



conclusion that // 



njltt In In r> 'f UK 



within /." Ma\ei, how. only 



suites the principle, but ilh rically the transfer 



of muscular heat to external space. A bowler who imparts 

 a velocity of 30 feet to an 8-lb. ball consumes in the act 

 nth of a grain of carbon. at of the muscle is 



distributed over the track of the hall, 1" 

 :.v mechanical friction. A man weighing l, r >' 

 mes in lifting his own body to a heiglit of 



' - -arhon. .lumping from this height the 

 heat is restored. The consumption of 2 oz. 4 drs. 20 grs. 

 of carbon would place the same man on the summit of a 

 mountain '--et high. In descending the mountain 



an amount of heat equal to that produced by the com- 

 bustion of the foregoing amount of carbon is restored, 

 muscles of a laborer whose weight is 150 Ibs. 

 When dried they are reduced to 15 Ibs. Were the 

 sponding to a day-laborer's ordinarv work 

 exerted on the- muscles alone, they would be wholly 



i in 80 days. Were the oxidation necessary to sustain 

 the heart's action cone. on the heart itself, it would 



in 8 days. And if we confine our 



to the two ventricles, their action would consume th* 

 associated muscular tissue in 34 days. With a fullness and 

 -ion of which thi* 



and lM. r >, deal with the great question of vital 

 nics. 



t opposition. moreoYer, t. the foremost scien tide 

 lilies of that day. with Liebig at ti :. this 



i worker was led by his 



played 

 fat. which had been previ 



