LIST OF ILLUSTRATIONS. 



PLATES. 



To face p. 



I. The Chadwell Spring in September, 1898 . . Frontispiece, or 69 



II. Wheat-Stalks damaged by Hailstones 119 



III. Geological Map of "West Herts 153 



OTHER ILLUSTRATIONS. 



Section 1. — Gravel Pit, Aldenham 155 



2. — In the same Pit 155 



3, 4, and 5. — Near "Wigginton 156 



6. — At Champneys 158 



7.— Gravel Pit, Watford 160 



8.— Bernard's Heath, St. Albans 161 



9.— Ideal Section of Glacial Drift 162 



10.— Near Gubblecote 164 



