The Formation of Vegetable Mold Through the Actions of Worms
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The Introduction begins: "The share which worms have taken in the formation of the layer of vegetable mould, which covers the whole surface of the land in every moderately humid country, is the subject of the present volume. This mould is generally of a blackish colour and a few inches in thickness. In different districts it differs but little in appearance, although it may rest on various subsoils." According to Wikipedia: "Charles Robert Darwin (12 February 1809 - 19 April 1882) was an En...























