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STANHOPE BAYNE-JONES 



jectious of the seiiiiluiuir \'al\'es were successful in ouly three 

 normal hearts. The pulmonic were more easily injected than 

 the aortic, due to the fact that the insertion of the cannulae into 

 the sinuses of Valsalva compresses the blood-vessels of the 



Fig. 5 Injected blood-vessels in the chordae tendineae of the pig's heart. 



aortic valves. A drawing made upon a photograph of a specimen 

 of an injected pulmonic valve is shown in figure 7. In this, the 

 few delicate vessels which, arising from the vasa vasorum where 

 the cusps are attached to the wall of the artery, penetrate the 



