BOOKS IN EUROPEAN LANGUAGES
S. I. LEVY
B.A. (Cantab.), B.Sc. (Lond.), F.I.C.
Formerly Hutchinson Research Student, St. John's College, Cambridge, and Late of the Factories Branch, Department of Explosives Supply.
Author of "The Rare Earths."
London: Sir Isaac Pitman •& Sons, Ltd. Bath, Melbourne and New York