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It is not our purpose to give a treatise on this subject but to confine this chapter to an exposition of a few of the gliders and model forms which are found to be most efficient for experimental work. AN EFFICIENT GLIDER. Probably the simplest and most efficient glider, and one which can be made in a few moments, is to make a copy of the deltoid kite, previously referred to.
In the rare cases in which the skin of the greater part of the body is affected, the nodules rarely appear below the level of the deltoid or the middle third of the thigh, the patient dying before the spread can reach the distal portions of the limbs.
The head, chest, body, and male genitals were well formed, and the child survived. Hutchinson reports the history of a child born without extremities, probably the result of intrauterine amputation. The flaps were healed at the deltoid insertion and just below the groin. Pare says he saw in Paris a man without arms, who by means of his head and neck could crack a whip or hold an axe.
Bouroche, brandishing the long, keen knife, cried: "Raise him!" seized the deltoid with his left hand and with a swift movement of the right cut through the flesh of the arm and severed the muscle; then, with a deft rearward cut, he disarticulated the joint at a single stroke, and presto! the arm fell on the table, taken off in three motions.
It appeared that he was that sort of a man that, if a man wanted anything of him, he had only to speak for it "wunst;" and that one of his peculiarities was an instant response of the deltoid muscle to the brain, though he did not express it in that language.
Instead of being inserted with the rest on the outside of the arm-bone, the lowest muscle takes another road, and is inserted in the under part of the bone, in company with the great latissimus dorsi, and these tightening while the deltoid slackens, pull the arm down.
Restoration of function is usually complete; but when the nerve supplying the muscle is bruised at the same time, as may occur in the deltoid, wasting and loss of function may be persistent. In exceptional cases the process of repair may be attended with the formation of bone in the substance of the muscle, and this may likewise impair its function.
Poplars are not generally associated exclusively in forests; but at the point where the Ohio and the Mississippi mingle their waters are grand forests of Deltoid Poplars, that stamp upon the features of that region a very peculiar physiognomy.
If the left arm be raised to a vertical position and dropped to a horizontal, somewhat vigorously, the tapering ends of the pectoralis major and the tendons of the biceps and deltoid may be felt by pressing the parts in the axilla between the fingers and thumb of the right hand. The action of its antagonist, the triceps, may be studied in the same manner.
There is probably nothing that has such a tranquilizing effect, and leads into such content as gardening. By gardening, I do not mean that insane desire to raise vegetables which some have; but the philosophical occupation of contact with the earth, and companionship with gently growing things and patient processes; that exercise which soothes the spirit, and develops the deltoid muscles.
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