LIST OF ILLUSTRATIONS. 



PIG. PAGB 



1. Embrj'o of Bean » 2 



2. A Bean Seedling 3 



3. Cross-Section of Seed of Pine 3 



4. Spores of Puff-Bali 4 



5. Many-Celled Spores 4 



6. Bacteria 6 



7. Bacteria from the Air 8 



8. Yeast Plants 9 



9. Bread Mould 10 



10. Cheese Mould 10 



11. Grape Leaf with Spots of Mildew . . . .10 



12. Fragment of Grape Mildew, much magnified . 11 



13. Fruit of Plum-Knot 12 



14. Polyporus from a Tree Trunk, — top view . . 12 



15. Mushroom Spawn 14 



16. Mushroom 14 



17. Desmids 16 



18. Diatoms 17 



19. Red-Snow Plant 18 



20. Zygnemix 18 



21. Lichen 19 



22. Gonidia from a Lichen 20 



23. Liverwort 21 



24. Pigeon-Moss 23 



25. Capsule of Moss 23 



26. Polypody Fern 25 



27. Fruit Dot of Polypody, — top view . . . .25 



