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Fig. 2. — Glacially SxRiAThD Erratic from Mkdmerrv near Selsey (Portion of a Block wkk.hing upwards of 2 Tons). [From a photograph, half natural size, by Mr. J. J. H. Teall, F.R.S.] ^^^B>£, 1 ; ,s^i ! 4 3 + . J + Fig. 3. — Contour Map of a Portion of the South Downs between the Valley of the Adur and the Devil's Dyke. (Scale, I inch to I mile) Explanation of Tints. = 0-100 feet 1= 100-200 feet 2 = 200- 500 feet 3 = 300-400 feet 4=400-500 feet 5 = 500-600 feet 6=600-700 feet 7 (black) = 7oo-8oo feet To face page 20.
