THE LIVER. 163 



blood-vessels is best studied in sections from a human 

 or rabbit's liver, which has been injected through the 

 portal vein with the blue gelatin mixture. The sections 

 are stained with eosin and mounted in balsam. 



Injected Gall-capillaries. By a careful injection of the 

 blue gelatin mixture into the hepatic duct, the gall-capil- 

 laries may be partially filled. Sections are stained with 

 eosin and mounted in balsam. 



To show the relation between the blood- and gall- 

 capillaries, both may be simultaneously injected with 

 gelatin of different colors, one forced into the hepatic 

 duct, the other into the portal vein. 



