The Microscope. 149 



By careful observation all the following may be made out : 



Fig. 1. 



1st. The lung is richly supplied with ganglionic cells ; 

 abounding everywhere, but more especially in the alveoli. 



2d. There are ganglia composed of numerous cells, some 

 of which have but one process, fig. 1 : these ganglia are often 

 found occupying an alveolus. 



3d. There can be seen projecting into the alveoli large 

 unipolar ganglionic cells, fig. 2, A.: one or more cells of like 

 character can be found in nearly every alveolus. 



Fig. 2. 



4th. In many localities, out of the alveoli, can be found 

 numbers of smaller unipolar cells, fig. 2, B. 



