62 



at the part for the supply of which they 

 are designed. They then split into nu- 

 merous branches which communicate with 

 each other, and again subdivide and re- 

 join, their communications appearing to 

 multiply as they become more minute; 

 so that every part of the body has a kind 

 of net work of nerves, which is minute in 

 proportion to the susceptibility and sen- 

 sibility it possesses. 







This general and imperfect sketch of 

 the anatomy of the nefvous system, re- 

 lates only to what may be discovered 

 by our unassisted sight. If by means of 

 the microscope we endeavour to observe 

 the ultimate nervous fibres, persons in 

 general are as much at a loss as when 

 by the same means they attempt to trace 

 the ultimate muscular fibres. 



Those fibres which we can split off 



