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Of the ufe of the pericardium. 



Of the HEAR T. 



171. Of the fituation of the heart. 

 e Of its form, and general ftruc- 



ture. 1 



Remarks on the difpofition of its 

 mufcular fibres. 



172. Divifion of the heart, into auri- 

 cles, and ventricles. 



Of the fepta between the auricles 



and ventricles. 

 Of the foramen ovale. 

 Obfervations on its being fome- 



times found pervious in the 



adult fubjecl. 



Of the Right Auricle. 



173. Its form, fubftance, and fitua- 

 tion. 



Of the opening of the two vena 

 cavce into it. 



Of 



