RADIO-ACTIVE ELEMENTS.

A Popular account of Radium and other Radio-active Elements treated experimentally.

Including a number of Radium Photographs and other Illustrations.

By LEONARD A. LEVY and HERBERT G. WILLIS.

PRICE 2s. 6d. net; post free 2s. 9d.

CONTENTS.

Introduction.—Chap. I. The Discovery of Radium; its Extraction.—Chap. II. The Radium Emanation.—Chap. III. Physical Effects (Electrical and Magnetic).—Chap. IV. Physical Effects (continued).—Chap. V. Chemical Effects.—Chap. VI. Actions on Animal Life and Living Tissues.—Chap. VII. Other Radio-active Elements.—Appendix.—Experimental Apparatus.

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