22 LECTURE I. 



magnified about 500 times. The fibres 

 were slightly undulating, and one set ter- 

 minating, another began : neither were the 

 sets of fibres of considerable length. The 

 muscular fibres were connected by cross 

 threads of common cellular substance. 



Mr. Carlisle, in whose talents and ac- 

 curacy we are all disposed to place con- 

 fidence, in the Croonian Lecture, printed 

 in the Philosophical Transactions for 1805, 

 says, that he can distinctly see an ultimate 

 muscular fibre, which he describes " as a 

 solid cylinder, the covering of which is 

 reticular membrane, and the contained part 

 a pulpy substance irregularly granulated.'* 

 He has also described the termination of 

 nerves in muscles. 



Muscles are liberally supplied both with 

 blood vessels and nerves, but nothing pecu- 

 liar is perceived in their distribution. We 

 make them very red by injecting them, and 

 we see numerous nerves entering their sub- 

 stance at various places. Yet the vessels of 

 some muscles are too minute to receive red 



