Feet. In. Light Blue Clay, with light-coloured stone 19 11 Brown Clay, with white stone 54 11 Dark Mottled Clay 15 0 Similar Clay, with dark and green sand 4 0 The same, very hard 3 0 The same, very hard, and dark sand 2 0 Lighter-coloured Hard Clay 5 0 The same, and dark sand 6 0 Large Pebbles 0 6 Clay and Sand 5 0 Light Blue Clay 0 4 Light-coloured Stone, with red and blue spots 1 3 Mottled Clays 7 11 Yellow, Light Blue, and Green Clay 1 0 Dark Green Clay, with black veins and spots 5 0 Blue Clay 1 6 Very Hard Brown, Yellow, and Blue Clay 4 0 Light Brown Running Sand, with water 2 6 Hard Mottled Clays 6 6 Light Brown Dead Sand 8 8 Black Peat, with dark pebbles 0 6 Brown and Green Gravel, with flints 3 2 Green Clay 0 4 -------- To Chalk 158 6 Chalk, with beds of flint 4 to 15 inches in thickness, 15 to 24 inches apart; 395-1/2 feet down, from surface, a bed of flint 6 feet thick 254 0 -------- Total 412 6 -------- Water rises to a height of 125 feet below the surface. The yield is about 190 gallons a minute. [Illustration: WELL AT HIGHBURY. Fig. 243.] [Illustration: Plan. Fig. 244.] [Illustration: Pipes Enlarged. Fig. 245.] _Highbury_, Middlesex.--Well at the residence of H. Rydon, Esq., New Park. Figs. 243 to 245. The shaft is 4 feet 6 inches diameter, and 136 feet deep, steined with 9-inch work set in cement. The bore was commenced with a 12-inch hole, but the character of the ground was such that the successive reductions in size, shown in the enlarged section of the lining tubes, Fig. 245, had to be made. When in the chalk the bore was continued some 48 feet unlined. The strata passed were;-- GRAVEL 3 feet. LONDON CLAY, 111 feet;-- Blue Clay 110 " Claystone 1 "