LIST OF ILLUSTRATIONS 



1. Germinating Seedlings of Beans . , Face page 6 



2. Seeds of Barley at Various Stages of Growth . „ 8 



3. Mint Plant in Water splitting up Carbon Dioxide 



and evolving Oxygen . . . . „ 24 



4. Apparatus to show the Absorption of Carbon 



Dioxide by Green Leaves . . • »> 24 



5. Starch Formation in the parts of an Artichoke 



Leaf exposed to Light . . . • ?. 26 



6. Barley Seedlings enclosed within Bottle . „ 30 



7. Fern that has been growing inside a closed Bottle 



for Thirty-six Years • • • • ,, 32 



8. Transpiration of Water from Leaf . • » 35 



9. Apparatus for Measuring Transpiration from Leaf „ 36 



10. Stomata on Lower Surface of Sweet Pea Leaf . „ 38 



1 1. Root Hairs of Barley • • • • ,, 50 



12. Contractile Taproot of Dandelion . • » 44 



13. Slab of Polished Marble etched by Roots of Bean 



Plant ....... 50 



14. Series of Plants grown in Water Cultures . „ 52 



15. Diagram showing Migration of Foodstuffs with 



the Grain of Wheat . . . . „ 64 



