. A catechism of natural theology. Natural theology; Anatomy. 132 MECHANISM OF THE MUSCLES. Fig. e the trochlear muscle, which arises at the bottom of the socket of the eye, and passes upward and forward like the rope in the no-lire 23, till it reaches the pulley at d, on the inner edge of the bony rim around the front of the eye, where it is turned backwards, and inserted into the top of the ball. T. There is quite as curious an example in the wing of the bird. A. It is necessary the weight of the bird should hang below the wings, so as to balance the body in the air, and prevent it from
. A catechism of natural theology. Natural theology; Anatomy. 132 MECHANISM OF THE MUSCLES. Fig. e the trochlear muscle, which arises at the bottom of the socket of the eye, and passes upward and forward like the rope in the no-lire 23, till it reaches the pulley at d, on the inner edge of the bony rim around the front of the eye, where it is turned backwards, and inserted into the top of the ball. T. There is quite as curious an example in the wing of the bird. A. It is necessary the weight of the bird should hang below the wings, so as to balance the body in the air, and prevent it from turning over ;—for the weight of the body under the wings is the same as the ballast of a vessel under the sails. This requires that the muscles which constitute the principal part of the weight, should be disposed as much as possi- ble upon the breast, and this principle we find to be observed. Every one who has seen a fowl upon the table, knows that upon the back, above the wing, there is only a mere skin. But the question arises, if the muscles, which are wanted to raise the wings, are situated beneath them, how are the wings to be elevated in the act of flying ? As the muscle can only contract downwards, how is this to produce a. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Nichols, I. (Ichabod), 1784-1859. Boston : W. Hyde
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Keywords: ., bookcentury1800, booksubjectanatomy, booksubjectnaturaltheology
