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NUMBER 55 
NEW SERIES 
Objects Seen with the Microscope. 
By CHRYSANTHEMUM. 
XL.—STRUCTURAL CHARACTERISTICS OF SOME IMPORTANT 
Drugs. 
Aconiti radiw.—The powder of this drug consists 
mostly of small grains. They are frequently joined 
EXPLANATION OF THE FIGURE. 
1. Bark parenchyma; 2. Bark parenchyma, showing 
cork; 3. Transverse section through endodermis; 4. Stone 
cells ; 5. Parenchyma within endodermis ; 6. Stone cells 
within endodermis; 7. Wood parenchyma, showing starch ; 
8. Fragments cf vessels ; 9. Endodermis. 
together and tlie illustration given herewith shows the 
shape and arrangement of the grains, as found in the 
parenchyma of the bark and wood. The cross-section 
through the endoplasm and adjoining cells clearly illus- 
trates a highly characteristic feature of the root, whilst 
