40 HISTOLOGY OF MEDICINAL PLANTS 
The entire set should be protected from dust by keeping it in a 
case, the cover of which should be closed when the set is not 
in use. 
MEASURING CYLINDER 
In order accurately to measure micro-chemical reagents, it 
is necessary to have a standard 50 c.c. cylinder (Fig. 39) graduated 
Fic. 39.—Measuring Cylinder Fic. 40.—Staining Dish 
to c.c.’s. Such a cylinder should form a part of the reagent set. 
STAINING DISHES 
There is a great variety of staining dishes (Fig. 40), but 
for general histological work a glass staining dish with groves 
for holding six or more slides and a glass cover is most desirable. 
