Fig. 1. 



Section of part of the wall of a healthy rabbit's appendix, stained 

 \v)th eosin and then by Grain's method. (From a camera lucida 

 drawing; 1/12 in. objective.) 



This section shows the enormous number of ingested bacteria in the 

 lymph node, and also the migration of the glandular lymphocytes 

 through the overlying epithelium. 



A small part of the lumen of the appendix is visible below. 



