Keywords: Vegetable Mould and Worms figure 6.png en Figure 6 from The Formation of Vegetable Mould through the Action of Worms curves adjusted in Photoshop to make background white Caption Fig 6 Transverse section across a large stone which had lain on a grass-field for 35 years A A general level of the field The underlying brick rubbish has not been represented Scale ½ inch to one foot Scanned from The Works of Charles Darwin edited by Paul H Barrett R B Freeman volume 28 1989 William Pickering London author October 1881 book publication The Formation of Vegetable Mould through the Action of Worms Black and white illustrations Uploads from public domain works by User Richard001 Soil science diagrams Rocks in art PD-old |