The treatment of a suspected coronary sclerosis is the same as that of general arteriosclerosis--primarily the elimination of anything which tends to cause high tension or to produce chronic endarteritis. When either general or local arteriosclerosis is present, the treatment which should be inaugurated comprises anything which would tend to inhibit the endarteritis and the classification--necessary periods of rest, the interdiction of all physical effort or physical strain, and the regulation of the diet, digestion and elimination. Perhaps there is no greater preventive of the advance of this disease than a diet considerably less than would be suitable for the same person when in perfect health and at his regular work. The amount of protein especially should be reduced, and the meal hours should be regular. Ordinarily all tea, coffee and tobacco should be forbidden, and alcohol should be allowed only to the aged, if allowed at all. It has long been considered that iodin would inhibit abnormal connective tissue growth. Iodin most readily reaches the blood as sodium or potassium iodid. Large amounts of iodin are not needed to saturate the requirements of the system for iodin, from 0.1 to 0.2 gm. (1 1/2 to 3 grains) preferably of sodium iodid, twice a day, after meals given with plenty of water, being sufficient; but it should be continued in one or two doses a day not only for weeks, but for months. Whether this iodid or iodin acts per se, or acts by stimulating the thyroid gland to increased activity and therefore to more normal activity, so that it is the thyroid secretion which is of benefit, it is difficult to decide. In view of the fact that in advanced years the thyroid is always subsecreting, and after the very diseases which cause arteriosclerosis or during the diseases which cause arterinsclernsis the thyroid is generally subsecreting, it would appear that the value of iodin is in its effect in stimulating the thyroid gland. If a small amount of thyroid secretion is evidenced by other symptoms, thyroid extract should be given. The dose need not be large, and should be small, but should be given for a considerable length of time. If the patient seems to be improving on small doses of iodid, however, and the thyroid is supposed not to be very deficient, it is better not to administer thyroid extract, unless the patient is obese.