DK JOSEPH A. BLAKE. 



of its enlargement to become arch of aorta. It had been 

 hardened in formalin, but not distended. 



Before the drawings were made the heart was freed from the 

 lung, and the incisions in its substance closed. They represent 



Innom. Art 



L. Com. Car. 



L. Subcl. 



R. Pulm. Alt. 



Sup C IV I 

 Aorta (ascend ) 



Aorta (descend.). 

 Diutus \ittiiusus 

 L Pulm % n s 



1 I'ulin A.rt 



J \m Append 

 Pulm Aittij 



Fic. 1. — Ventral View. (Twice natural size.) 



very accurately the appearance of the exterior of the organ, 

 except that in order to represent the relations of the vessels 

 clearly, the transverse portion of the aortic arch is raised from 

 the right pulmonary artery, thus adding slightly to the length 

 of the ascending portion. 



