The hand : its mechanism and vital endowments, as evincing design, and illustrating the power, wisdom, and goodness of God . AEM-BONE OF HORSE. that the articulating surface is less regularly inspecting the lower extremity of such a bone,we shall perceive that the grooves into which the bonesof the fore-arm are socketed, are hollowed out sodeei)ly, that the joint could only have the motion of asimple hinge ; and neither the form of the articulatingsurface, (which is here called trochlea,) nor the crestor spine above noticed on the outside, will present anysigns of one bone of the for
The hand : its mechanism and vital endowments, as evincing design, and illustrating the power, wisdom, and goodness of God . AEM-BONE OF HORSE. that the articulating surface is less regularly inspecting the lower extremity of such a bone,we shall perceive that the grooves into which the bonesof the fore-arm are socketed, are hollowed out sodeei)ly, that the joint could only have the motion of asimple hinge ; and neither the form of the articulatingsurface, (which is here called trochlea,) nor the crestor spine above noticed on the outside, will present anysigns of one bone of the fore-arm having rotated on CHAP. III. OF THE HUMEEUS. 73 the other. We have, therefore, got the hone of anherbivorous quadruped, either with a sohd, or with acloven foot. In the bat and mole, perhaps, the best examples areseen of the bones of the extremity being moulded tocorrespond with the condition of the animal. The. FROM THE HOLE. mole is fitted, by means of its anterior extremities,to plough its way under gTound. The bat has the samesystem of bones; but they are adapted to form a wingfor raising the animal in the atmosphere, and with aprovision for its clinging to the wall, although not tobear upon it. In both these animals we recogniseevery bone of the upper extremity; but how verydifferently formed and joined! In the mole, thesternum or breast bone, and the clavicle are remarkablylarge: the scapula, or shoulder blade, assumes theform of a high lever: the humerus is thick and short,and has such prominent spines for the attachment of 74 ANATOMY muscles as to indicate great power. The spines whichgive origin to the muscles of rotation, project in an extra-ordinary manner; and the hand is large, flat, and soturned that it may shove the earth aside like a plough-share.*
Size: 2004px × 1247px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjecthand, bookyear1874
