The hand : its mechanism and vital endowments, as evincing design, and illustrating the power, wisdom, and goodness of God . of the humerus, by striking against the edgesof the socket. Such appearances alone are sufficientto show that all the motions of the arm are free. To give assm-ance of this,and to illustrate how theform of the shoulder pointsto the structure of the wholearm, suppose that the geo-logist has picked up thisbone in interesting circum-stances. To what animaldoes it belong ? The glo-bular form of the articulat-ing surface, and the veryslight projection of the tubercles, evince
The hand : its mechanism and vital endowments, as evincing design, and illustrating the power, wisdom, and goodness of God . of the humerus, by striking against the edgesof the socket. Such appearances alone are sufficientto show that all the motions of the arm are free. To give assm-ance of this,and to illustrate how theform of the shoulder pointsto the structure of the wholearm, suppose that the geo-logist has picked up thisbone in interesting circum-stances. To what animaldoes it belong ? The glo-bular form of the articulat-ing surface, and the veryslight projection of the tubercles, evince a latitude of motion. Now, freedomof motion in the shoulder implies a similar freedom inthe extremity or paw, and a power of rotation of thewrist. Accordingly, we direct the eye to that part ofthe bone which gives origin to the muscles for turningthe wrist (the Supinator muscles); and the prominenceand the length of the ridge or crest, situated on thelower and outer side, from which these muscles arise,at once prove their strength, and that the imw hadfree motion. Therefore, on finding the humerus thus AUa-BONE OF BEAR. 72 COMPARATIVE ANATOMY chap. in. we conclude that it belonged to an animal with sharpmoveable claws; that, in all probability, it is theremains of a bear. But, suppose that the upper head of the bone hasa different character: that the tubercles project, so asto limit the motion in every direction but one, and
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjecthand, bookyear1874
