410 



ANIMAL MECHANICS. 



Man in the shoulder muscles more nearly than the Chimpan- 

 zee does, while he deviates farther from the hand of Man 

 than does the Chimpanzee. 



If we take the walking muscles of the hand and foot as 

 our standard of comparison, and inquire the proportion which 

 the grasping muscles bear to them, we shall obtain the follow- 

 ing instructive Tables, which show, in a remarkable way, the 

 profound difference between a hand and a fQot, even in Qua- 

 drumanous animals : — 



Comparison of Walking and Grasping Muscles in the Foot of 

 Man and the Quadrumans. 





Walking 

 Muscles. 



Grasping 

 Muscles. 



r. 



Man, . . . 





100 



14. 6 



2. 



Gorilla, . . 





100 



78.2 



3- 



Chimpanzee, . 





100 



56.8 



4- 



Hamadryas, . 





100 



43- 1 





Cynomolgus, . 





100 



58.4 



6. 



Mandrill, . . 





100 



60.5 



7- 



Ehesus, . . 





100 



5 2 -4 



8. 



Ateles, . . . 





100 



36.8 



Tn the foot, the grasping power is less than the walking 

 power. 



Comparison of Walking and Grasping Muscles in the Hand of 

 Man and the Quadrumans. 





Walking 

 Muscles. 



Grasping 

 Muscles. 



I. 





IOO 



27 1 .0 



2. 



Gorilla, . . 



IOO 



295.6 



3- 



Chimpanzee, . 



IOO 



300. 0 



4- 



Hamadryas, . . 



IOO 



141. 7 



5- 



Cynomolgus, . . 



IOO 



343.5 



6. 



Mandrill, . . . 



IOO 



26 r . 1 



7- 



Ehesus, . . • 



IOO 



205.0 



8. 





IOO 



337-5 



In the hand, the grasping power is greater than the walk- 

 ing power. 



