SECTION CUTTING. 201 



Section-cutting Instruments. Solid tissues are, as a 

 rule, much too hard to admit of being cut either by 



FIG. 140. Dissecting in, a fluid Medium. 



scissors or Valentin's knife. As important information 

 will be gained respecting the structure of such sub- 



Fio. 141.. "Dissecting Scissors and Forceps. 



stances as stems and roots of plants, horns, hoofs, car- 

 tilages, and other firm parts of animals, by cutting 



