PLATE XVI. 



VEGETABLE STRUCTURES. 



1. Cells of Torula Cerevisia, or Yeast Plant. 2. Hairs of Urtica Dioica, or Stinging-Nettle. 3. Ciliated 

 spores of Confervse. 4. Starch-grains broken by applying heat. 5. Starch from Tous-les-mois. 

 6. Starch from Rice. 7. Starch from Sas?o. 8. Imitation- Sago Starch. 9. Wheat Starch. 10. Rhu- 

 barb Starch retained in their cells. 11. Maize Starch. 12. Oat Starch. 13. Barley Starch. 14. Potato 

 Starch. 16. Section of Potato attacked by fungoid disease. 17. Section of Potato, showing total 

 absence of Starch grains. 18. Section of Potato, cells filled with healthy Starch grains. 15. Section 

 of a ripe Strawberry, cells ovoid, and containing a brown nucleus. 19. Mushroom Spawn, elongated 

 cells. 20. Simple stellate tissue from the stem of a Rush. 21. Spiral vessels from the Leek and 

 Rhubarb. 22. Radiating cells or pores from the outer shell of the Ivory-Nut. 



