Barrett, T. J. — Harnessing the Earth-Worm.

London 1949. 8vo. 182 pp.; seven plates. Cloth with dustjacket. = Interesting, seldom-seen practical inquiry on the action of Earthworm for biological soilbuilding without using chemicals. We added: Darwin on Humus and the Earthworm, the formation of vegetable mould, through action of worms with observation by Charles Darwin, with a new introduction by A. Howard (1945). 153 pp., 15 figs. Cloth also with dustjacket. Both in very good condition.