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And yet nothing less than dilatation and enthusiasm like this is the badge of the master walker. If we are not sad, we are careworn, hurried, discontented, mortgaging the present for the promise of the future. If we take a walk, it is as we take a prescription, with about the same relish and with about the same purpose; and the more the fatigue, the greater our faith in the virtue of the medicine.

Dilatation of the cutaneous vascular areas leads to a larger flow of blood through the skin, and so tends to cool the body, and vice versa. Also the special nerves of perspiration can increase or lessen heat loss by promoting or diminishing the secretions of the skin.

Experimental excitation, by means of galvanism or mechanical irritation, causes different results when applied to spinal nerves, to different parts of the spinal cord, or to different parts of the brain. Galvanism applied to a spinal nerve, determines, it has been said, dilatation of blood-vessels, and increased secretion in glands.

Such regurgitation may occur without valvular disease if for any reason the left ventricle becomes dilated sufficiently to cause the valve to be insufficient. Such a dilatation can generally be cured by rest and treatment. As with mitral stenosis, the most frequent causes are rheumatism and chorea, with the occasional other causes as previously enumerated.

There is another species of rupture of the heart which is not traumatic, in which the rupture occurs spontaneously, the predisposing cause being fatty degeneration, dilatation, or some other pathologic process in the cardiac substance.

Nor is the difficulty to be evaded by the assumption of the soul assuming a different condition through contraction or dilatation. For this would imply that the soul is subject to change, and all the imperfections springing from it, viz. non-permanence, and so on, and hence would not be superior to non-sentient things such as jars and the like.

"So it is!" reiterated R , expelling a tremendous and satisfactory cloud of smoke that took the shape of a balloon, and ascending towards the cottage beams, puzzled me, by its great dilatation, to think, how such a gigantic volume of sooty exhalation, as Dr. Johnson would say, could be compressed into a small compass, like R 's mouth.

It is in the relaxation of security, it is in the expansion of prosperity, it is in the hour of dilatation of the heart, and of its softening into festivity and pleasure, that the real character of men is discerned. If there is any good in them, it appears then or never. Even wolves and tigers, when gorged with their prey, are safe and gentle.

If there is no serious fatty degeneration, the patient, with the modified life outlined, may live for a long time. Acute dilatation from any serious strain on the heart may occur, and if there is fatty degeneration it is liable to occur at any time. Attacks of cardiac asthma are always serious, and always damage the heart a little more.

Portions of malignant tumours also may form emboli, and their impaction in the vessels may lead to the development of secondary growths in distant parts of the body. Fat and air embolism have already been referred to. Pyogenic. Non-suppurative inflammation of the coats of an artery may so soften the wall of the vessel as to lead to aneurysmal dilatation.