Note 81 — Chapter VI
Reading edition
For a discussion on the doctrine of signatures see T. J. Pettigrew, Superstitions, etc., pp. 33 f.; E. Berdoe, Origin and Growth of the Healing Art, pp. 327 and 416 f.; A. D. White, History of the Warfare of Science with Theology, II, pp. 38 f.; Eccles, Evolution of Medical Science, pp. 140 f.