Joseph Marsliall Flint 



287 



coarse elastic fibres running in between the elastic tissue bundles. In 

 the meshes of the elastica are found numerous bundles of ordinary 

 fibrous tissue so that in digested specimens the position of the elastica, 







f3\.,c 



Fig. 7. — Section preceding the one sliown infifjnre5. — Stained hy a modified Weigerf ft 

 elastic stain. Magnified about 8.5 diameters. The elastic membrane, tlie concentric 

 lamellne about tlie interlobular duct are clearly shown together with the elastic fibres 

 scattered throughout the interlobular space. The characteristic arrangement of the 

 fibres about the blood-vessels can also be noted. In comparing this figure with the 

 preceding one the mucous alveoli are seen to be surrounded by a delicate elastic 

 membrane while only occasional fibrils are found about either the seious alveoli or 

 the intralobular ducts. 7), Intralobular duct ; T' Intralobular vein ; A, Intralobular 

 artery; J/, Mucous alveoli. 



even though it has been dissolved by the enzymes, is indicated by the 

 fact that the frame-work is more open at the points previously occupied 

 by the elastic fibres. 



