NATURAL THEOLOGY. 97 



great pressures for which we have occasion at the 

 wrist and elbow; but few are probably aware how 

 ingenious it is, and how necessary to enable us to per- 

 form one of the most simple motions of the hand. 

 Here is an example of creative skill which is always 

 before us. Truly may we say, that to be convinced 

 of the hand of God, we have only to look upon our 

 own. 



T. But you have not finished the description of 

 this remarkable workmanship. 



A. The construction adopted gives the benefit of 

 a long shaft to the hand running as high as the elbow. 

 This supports the joint when we turn the hand with 

 a strong twist, much more than if the hand had been 

 set to the wrist by a simple socket. If we grasp the 

 arm a little above the wrist, when we roll the hand 

 we shall feel the shaft bone revolving. A mechanic 

 would understand the ingenuity of this structure ;-as 

 an improved instrument, for screwing and wrenching, 

 has recently been invented in almost exact imitation 

 of -the human wrist. It is obvious that the muscles 

 which roll the hand are applied to much greater ef- 

 fect by means of this contrivance ; for we find up- 

 on examination, a part is attached along upon the 

 upper extremity of the shaft, just as in using a pair 

 of pincers, we always apply our strength at the ends 

 of the handles. 



It may here be mentioned, that the monkey has 

 one more bone in the wrist than is found in the hu- 

 man species. 



