Note 171 — Chapter II
Reading edition
Respecting the connection between the vegetable productions of a country and its geognostic peculiarities, little is yet known; but the reader may compare Meyen's Geography of Plants, p. 64, with Reports on Botany by the Ray Society, 1846, pp. 70, 71. The chemical laws of soil are much better understood, and have a direct practical bearing on the use of manures. See Turner's Chemistry, vol. ii. pp. 1310–1314; Brande's Chemistry, vol. i. p. 691, vol. ii. pp. 1867–1869; Balfour's Botany, pp. 116–122; Liebig and Kopp's Reports, vol. ii. pp. 315, 328, vol. iii. p. 463, vol. iv. pp. 438, 442, 446.