PLATE 2. Adulterations. 



Figure 

 1. 



2-11 



4. 



5. 



7. |1 



a li 



9. 

 10. 



11. 

 12. 



13. 

 14. 



15. p 



16. 5 



17. Si 

 SI 



18. p 



19. || 



Tea. a, point of leaf ; 6, under surface, with stomata and hairs ; c, epi- 

 dermis of midrib with raphides ; d, sclerogen cell from inside the 

 leaf. 



ISloe. a, point of leaf ; 6, upper surface, showing hairs and striated 

 parenchyma. 

 Elder, a, point of leaf ; 6, upper surface ; c, under surface of leaf, with 

 sinuous striated cells and glandular hairs. 



Cocoa, a, epidermis of husk ; 6, cells containing mucilage and raphides ; 

 c, hexagonal cells beneath the mucilage layer ; d, parenchymatous 

 granular cells, forming the inner layer of husk ; e, endosperm-cells 

 containing starch -grains. 



Coffee, a, prosenchymatous cells of investing membrane of berry ; 

 6, thick-walled cells of endosperm, containing oil-globules. 



Chicory, a, laticiferous vessels ; 6, pitted tissue ; c, cellular tissue. 

 Acorns, a, portion of husk ; b, cells of endosperm filled with starch. 



Carob or locust-beans, a, 6, characteristic tissues in pod ; c, wedge- 

 shaped, and d, sphaerenchymatous cells of bean containing dark nuclei. 



Date-stones. Sclerogen-cells of albumen. 



Figs. , laticiferous tissue ; 5, cellular tissue ; c, a hair ; cZ, woody 

 L tissue ; e, sphaeraphides ; /, characteristic tissue in fig-seed. 



Mustard, a, b, c, tissues in the husk ; d, substance of the seed con- 

 sisting of granular matter and oil-globules. 



f Pepper, a, 6, c, characteristic tissues in the husk ; d, cells containing 

 starch-granules. 



J Cayenne Pepper, a, very characteristic tissue ; b, skin. 



I Linseed. , epidermis ; 6, c, second and third tissues ; d, endosperm 

 with oil-globules. 



^Rice-husk, a, chief tissue of husk ; 6, the same broken up. 



C Tobacco. Epidermis of under surface of leaf, with glandular hairs. 



Dock. Epidermis of under surface of midrib, showing unicellular twisted 

 I hairs. 



] Rhubarb. Epidermis of leaf, showing short unicellular pitted hairs. 



| Coltsfoot. Epidermis of leaf, showing peculiar jointed hairs with long 

 ^ whip-like appendages. 



