LIST OF ILLUSTRATIONS 



Pondweed {Potamogeton natans) .... Frontispiece. 

 (W. Bell.) 



TO FACB 



Fig. pack 



I. — To illustrate Germination of Seeds in glass beakers . 3 



2. — Germination of Seeds in glass-fronted box • • • 3 



3. — Germination of Pea, Mustard, Wheat . . . • 5 



4, — Knight's Wheel (a device to counteract the action of 



gravity upon plant growth) ...... lO 



5. — Vegetative Propagation by Layers ..... 16 



6. — Vegetative Propagation by Budding and Grafting . . 16 

 7. — Pollination and Fertilisation of a Flower . . .18 



8.— Ditto 18 



(Figs. 1-8, Emmeline Radford, del.; Figs. 3-4, A. Newton, 

 photo. ; Figs. 1-2 and 5-8, W. E. Mayes, photo.) 

 9. — Structure of a Monocotyledonous Stem, Pondweed 



{Potamogeton natans) ....••• 3-2 



10. — Structure of a Dicotyledonous Stem, transverse section 



of E\m (Ulmtis carnpestris) ...... 3^ 



(Figs. 9-10, photomicro., C. R. Mapp.) 

 II. — Map of British Isles, showing the geological formations . 70 

 12. — Physical Map of British Isles to show altitudes . . 72 



(Figs. 11-12, Emmeline Radford, del. ; photo., A. Newton.) 

 13. — A damp Oakwood, open canopy with Wood Anemone, 



Hazel, etc 7^ 



(Photo., G. B. Dixon.) 

 14.— Remains of the Caledonian Forest, Oaks forming 

 originally Sandy Oakwood, with Bracken, Sheep's 



Sorrel, Woodsage, etc, 7^ 



(Photo., C. R. Mapp.) 

 15. — Heath-land, on Sandy Soil, Bracken, Gorse, etc. . . 80 

 (Photo., G. B. Dixon.) 



