(1) Ergebnisse der kosmischen Physik (2) Atmospheric Electricity (3) Die Aufrechterhaltung der elektrischen Ladung der Erde

Abstract

(1) THE title of the first of these books is somewhat misleading, its subject being geophysics, and having only incidental connexions with extra-terrestrial phenomena. The book is a contribution of exceptional value to the compilation-literature of science. It opens with an admirably comprehensive and concise account (86 pages) of aurorsæ, by C. Störmer, which is beautifully illustrated. Then follow two articles on special aspects of the penetrating radiation, namely, the barometer effect and the absorption coefficient, by W. Kolhörster and L. Tuwim; an account of atmospheric ozone, by P. Götz, and of abnormal sound-propagation in the atmosphere, by P. Duckert; and articles on geodesy, by F. Hopfner, and upon waves in air, water, and on sand, by F. M. Exner. The book is well bound and well printed, but its high price is regrettable.

(1) Ergebnisse der kosmischen Physik.

Heraus-gegeben von V. Conrad L. Weickmann. Band 1. (Gerlands Beiträge zur Geophysik, Supplementband 1.) Pp. xi + 448. (Leipzig: Akademische Verlagsgesellschaft m.b.H., 1931.) 46 gold marks.

(2) Atmospheric Electricity.

By Dr. B. F. J. Schonland. (Methuen's Monographs on Physical Subjects.) Pp. vii + 100. (London: Methuen and Co., Ltd,., 1932.) 2s. 6d. net.

(3) Die Aufrechterhaltung der elektrischen Ladung der Erde.

Von Prof. Dr. Egon Schweidler. (Probleme der kosmischen Physik, herausgegeben von Prof. Dr. Christian Jensen und Prof. Dr. Arnold Schwassmann, Band 15.) Pp. iv + 68. (Hamburg: Henri Grand, 1932.) 5 gold marks.