154 NORMAL HISTOLOGY. 



Sections of Intestine. Bits of intestine from the upper 

 portion of the duodenum, from the ileum, including one 

 of Peyer's patches, and from the large intestine, should 

 be stretched on cork and immersed in a mixture of equal 

 parts of one-half-per-cent. chromic acid sol. and alcohol ; 

 after four days they are transferred to alcohol, in which 

 in a day or two, they will become hard enough to cut. 

 Perpendicular sections from the various parts should be 

 stained and mounted in the same way as the stomach. 

 Sections from intestines, whose blood-vessels are injected 

 with blue, are stained with eosin and mounted in balsam. 



