. The formation of vegetable mould, through the action of worms, with observations on their habits. Earthworms; Humus; Soils. Chap. IV. OF ANCIENT BUILDINGS. 207 The section shown in Fig. 12 was taken in the centre of the Basilica, and though it was 5 feet in depth, the natural sub-soil was not Mould, 20 inches Rubble Tfi'h broken t lea, 4 incbes thick. Black decayed wood, in th ckf f t i'& t 6 incbes thick. Section in a block of buildings in the middle of the town of Silohester. reached. The bed marked " concrete " was probably at one time a floor; and the beds beneath s
. The formation of vegetable mould, through the action of worms, with observations on their habits. Earthworms; Humus; Soils. Chap. IV. OF ANCIENT BUILDINGS. 207 The section shown in Fig. 12 was taken in the centre of the Basilica, and though it was 5 feet in depth, the natural sub-soil was not Mould, 20 inches Rubble Tfi'h broken t lea, 4 incbes thick. Black decayed wood, in th ckf f t i'& t 6 incbes thick. Section in a block of buildings in the middle of the town of Silohester. reached. The bed marked " concrete " was probably at one time a floor; and the beds beneath seem to be the remnants of more ancient buildings. The vegetable mould was iO. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Darwin, Charles, 1809-1882. New York, D. Appleton
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectsoils, bookyear1888
