LIST OF PLATES. 



I. Map and Section showing the known and 



probable Coal-measures in South Wales, 

 the South of England, the North of France, 

 and Belgium 



II. Diagram to show the possible Occurrence of 



Coal-measures in the Eastern Counties . . 



III. Map of Hertfordshire showing its Climato- 



logical Stations 



lY 



YI 



YII. 



YIII 



Fig. 1. — Section of Chalk, Tertiaries, and 

 Diift, Midland Railway Cutting, North of 

 St. Albans. Fig. 2. — Hertfordshire Con- 

 glomerate, Townsend Farm, near St. Albans 



Fig. 1. — "Bacon's Mount," near Pre Wood, 

 St. Albans. Fig. 2.— Ruins of Old Gorham- 

 bury House, St. Albans 



Fig. 1. — Chalk -pit near Cribbs, Harefield. 

 Fig. 2.— Chalk-pit near the " Copper Mill," 

 Harefield, showing pipes in the Chalk . . 



Fig. 1 . — The River Colne at Colney Heath, 

 in June, 1893. Fig. 2. — Green Lane near 

 Colney Heath 



Oak tree on Hedges Farm, near St. Albans, 

 struck by lightning during the storm of 

 28th-29th June, 1893 (noticed on pp. 210 

 and 212) 



To face p. 89 



97 



157 



XXIV 



XXVI 



xlvi 



Frontispiece. 



Plates lY, Y, YI, and YII are from photographs taken by the 

 Editor. Plate YIII is from a photograph taken by Mr. Gerald 

 Phipps, of St. Albans. 



