HISTOLOGICAL DEMONSTRATIONS. 117 



maybe seen communicating with the spaces in the adenoid 

 tissue. 



194. Blood-vessels, Examine (L.) T. S. small intestine 

 with blood-vessels of villi injected. 



195. BrunneSs glands. Examine (L.) T. S. duo- 

 denum stained with carmine, showing Brunner's glands. 

 They are compound saccular glands. 



196. Peyer's glands. a. Examine (L.) T. S. or V. S. 

 small intestine, showing Beyer's sacs. These structurally 

 resemble the splenic corpuscles. 



b. (L.) A similar section with the capillaries in Peyer's 

 sacs injected. 



c. (H.) A similar section showing the lymph corpuscles 

 within the sac. 



The solitary glands found here and there in the small 

 and large intestine structurally resemble a single sac of a 

 Peyer's patch. 



197. Structure of L ar ge Intestine. Unstained, T. S. 

 or V. S. large intestine of cat prepared as directed in 

 191, a. Mount in Farrants' solution or in glycerine. (L.) 

 The follicles of Lieberkuhn in the mucosa. The sub- 

 mucous and muscular coats. 



(H.) Lieberkiihn's follicles similar to those of the small 

 intestine. 



198. Examine (H.) T. S. follicles of Lieberkuhn in 

 order to be able to recognise tubular glands such as those 

 when divided transversely. 



LIVER. 



199. Methods. a. The liver may be very successfully 

 hardened in Miiller's fluid, and then in rectified spirit, as 

 directed in 10. A one per cent solution of potassium 

 bichromate for a fortnight or so, followed by rectified spirit, 

 also gives very fair results. 



Sections of the hardened liver, imbedded in paraffin, 

 may readily be made. The sections should be examined 

 unstained and also stained with logwood, a dye peculiarly 

 suitable for the liver and kidney. In either case they 

 should be mounted in Farrants' solution, or in glycerine. 



