Page:The Formation of Vegetable Mould through the Action of Worms (1881).djvu/238

		Thickness of mould in inches.
13.	In another part of same field, trench 9½ inches deep, stopped by concrete	9½
14.	In another part of same field, trench 9 inches deep, stopped by concrete	9
15.	In another part of the same field, trench 24 inches deep, when sand was reached	16
16.	In another part of same field, trench 30 inches deep, when stones were reached; at one end of the trench mould 12 inches, at the other end 14 inches thick	13

Small field between "Old Works" and "Shop Leasows," I believe nearly as high as the upper part of the latter field.

		Thickness of mould in inches.
17.	Trench 26 inches deep	24
18.	Trench„ 10 inches deep, and then came upon a causeway	10
19.	Trench 34 inches deep	30
20.	Trench„ 31 inches deep	31

Field on the western side of the space enclosed within the old walls.

		Thickness of mould in inches.
21.	Trench 28 inches deep, when undisturbed sand was reached	16
22.	Trench 29 inches deep, when undisturbed sand was reached	15
23.	Trench 14 inches deep, and then came upon a building	14

Dr. Johnson distinguished as mould the earth which differed, more or less abruptly, in