448 ESSAYS and OBSERVATIONS 



in fix or feven branches which join at its 

 caput or firft remarkable turn into one 

 pipe, the numerous contortions of which 

 form the body of the epidydimis, termi- 

 nating at its other end in the vas defe- 

 rens. 



This feems to have been overlooked, 

 or not weii underftood, by moft of the 

 modern anatomifts, who have differed 

 ■widely, or talked with uncertainty, about 

 thefe pipes ; till of late, that the ingeni- 

 ous Dr Haller, by injedling quickfilver 

 from the vas deferens^ in the manner pro- 

 pofed by my father in the Medical Ef- 

 fays *, and caufing it to pafs as far as the 

 tefticle, has been able to explain to us, 

 with greater accuracy, the {lru(5lure of 

 this intricate organ f . He agrees with 

 De Graaf, that the epidydimis, from the 

 vas deferens to its head, feems to be com- 

 pofed of a fingle pipe, which he thinks 

 jnight poffibly be unloofened, as De 

 Graaf has reprefented ; but does not af- 



firni 



* Vol. V, Art. XX. § 29. 



t Phil. Tranf. No. 494- § ^^h 



