150 



Chapter IX 



Two animals were used, a large and a small one of the same species, 

 a cat and a kitten or a dog and a puppy. 



The smaller animal's heart was perfused. The perfusion took 

 place after the method of Haymans and Kochmann (13) ; the blood 

 went from the carotid artery of the large animal to the aorta of 

 the small one, its course was thence through the coronary arteries, 

 capillaries of the heart-muscle and coronary veins back into the 



FIG. 81. Shows the rate of flow through the coronary vessels (dotted line) ; and the 

 output of carbonic acid (continuous line). The figures along the ordinates are in 

 each case c.c. per minute, those on the left-hand side of each curve refer to the 

 continuous line, those on the right-hand side to the dotted line. The periods are 

 arranged along the abscissae. 



right side of the heart, out by the pulmonary artery and back into 

 the jugular vein of the perfusing animal. Between the pulmonary 

 artery of the perfused heart and the jugular vein of the perfusing 

 animal there was a T-tube. When one wishes to collect blood for 

 analysis one attaches a graduated pipette to the T-tube, opens the 

 clip and closes the tube at (7. The blood runs along the horizontal 

 pipette and its rate of flow can be measured directly. 



