250 LECTURE VI. 



and in this state they are the only parts 

 that have strength, so that we can dissect 

 them without injection, the other parts 

 readily giving way." He seems confident 

 that vessels form separately, and after- 

 wards become united with one another ; 

 and he believed that vessels might also be 

 thus formed and conjoined in the gela- 

 tinous substances effused previously to the 

 growth or reparation of parts. 



In the union by adhesion, he supposed 

 that though new vessels might be produced, 

 the original divided vessels pullulated and 

 inosculated, and became pervious and en- 

 tire as they were before their division, 

 so that blood or injection would permeate 

 them as before. He thought, that when 

 parts were united by a common vascular 

 substance, the vessels and vital agency of the 

 parts divided could gradually convert the 

 common uniting medium into its own na- 

 ture. Thus does he suppose that the ner- 

 vous fibres are produced and elongated 

 through the common uniting medium by 

 which a divided nerve is conjoined. We 



