III. The direct influence of gradual variations of temperature upon the rate of beat of the dog's heart

Abstract

In the investigations described, the method of experiment was such as to completely isolate physiologically the heart of the dog from all the rest of the body of the animal, lungs excepted. This was accomplished by occluding the right and left carotid and subclavian arteries, the aorta just beyond the origin of the left subclavian, and ligaturing both venæ cavæ and the azygos vein.