The hand : its mechanism and vital endowments, as evincing design, and illustrating the power, wisdom, and goodness of God . g that of the Draco fimbriatus, was expandedupon them. In the imperfect specimens upon whichwe have to found our reasoning, we cannot discover,either in the height of the hipbones, the strength of thevertebrse of the back, or the expansion of the breast-bone, a provision for the attachment of muscles com-mensurate with the extent of the supposed arm-bone and the bones which we presume to bethe scapula and coracoid, bear some correspondence tothe extent of the wi
The hand : its mechanism and vital endowments, as evincing design, and illustrating the power, wisdom, and goodness of God . g that of the Draco fimbriatus, was expandedupon them. In the imperfect specimens upon whichwe have to found our reasoning, we cannot discover,either in the height of the hipbones, the strength of thevertebrse of the back, or the expansion of the breast-bone, a provision for the attachment of muscles com-mensurate with the extent of the supposed arm-bone and the bones which we presume to bethe scapula and coracoid, bear some correspondence tothe extent of the wing; but the extraordinary circum-stance of all is the size and strength of the bones ofthe jaw, and vertebrae of the neck, compared with thesmallness of the body, and the extreme delicacy of theribs; which makes this altogether, a being the most incomprehensible in nature. g2 84 ANATOMY OF OF THE RADIUS AND ULNA. The easy motion of tlie hand, we might imagine toresult from the structure of the hand itself; but, onthe contrary, the movements which appear to belong toit, are divided among all the bones of the extremity.*. The head of the arm-bone is rotatory on the shoulder-blade, as when making the guards in fencing; but theeasier and finer rolling of the wrist is accomplished bythe motion of one bone of the fore-arm upon the ulna has a hooked process, the olecranon, or pro-jecting bone of the elbow, which catches round thelower end of the arm-bone (this articulating portionbeing called trochlea), and forms with it a hinge joint,for bending and extending the fore-arm. The radius,again, at the elbow, has a small, neat, round head,which is bound to the ulna by ligaments, as a spindleis held in the bush: and it has a depression with apolished surface for revolving on the condjde of the * In this sketch, the upper bone of the fore-arm is the radius ; and inrevolving on the lower bone, the ulna, it carries the hand with it. cnip. in. THE RADIUS AND ULNA. 85 humerus ; at the
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjecthand, bookyear1874
