gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1971.038.294.19 Book Reviews Understanding the Earth: A Reader in the Earth Sciences Howie R. A. 6 1971 38 294 257 258 Gass I. G. Smith P. J. Wilson R. C. L. Understanding the Earth: A Reader in the Earth Sciences Horsham, Sussex Artemis Press 1971 243 figs. Price £ 3·50 (boards), £2·10 (paper) Copyright © 1971, The Mineralogical Society 1971