[Titel fehlt]

The Aurora.- I. The geographical distribution of the aurora.- II. The auroral forms.- A. The bands.- B. The surfaces.- III. The development of auroral displays.- A. The typical displays seen at a single station.- B. Dynamics of the auroral displays.- C. Typical displays on a continental and on a planetary scale.- IV. The auroras and magnetic storms.- V. Radio studies of the aurora.- VI. Auroral particles and the radiation belts.- A. Motions of charged particles in a dipole field.- B. Balloon observations of auroral particles.- C. Rocket observations of auroral particles.- D. Satellite observations of auroral particles.- VII. The auroral spectrum.- A. Description and analysis of the auroral spectrum.- B. The production of the auroral spectrum.- C. Special types of aurora.- D. Upper atmospheric temperatures inferred from auroral spectra.- VIII. Theories of the aurora.- A. Historical reviews.- B. The geomagnetic field bounded by the solar plasma.- C. The ring current.- D. The formulation of the problem.- E. Present theories of the aurora.- References.- Time-Variations of Cosmic Rays.- First part: Results up to the International Geophysical Year.- A. Methods of observation.- B. Atmospheric effects.- I. Barometer effects.- II. ?-Meson decay effects and seasonal variations.- C. Diurnal variations.- I. Solar diurnal variations.- II. Sidereal diurnal variation.- D. World-wide variations.- I. Variations associated with magnetic storms.- II. Geomagnetic activity effects.- III. Variation with sunspot cycle.- IV. 27-day variations.- E. Solar flare effects.- I. Large increases of cosmic-ray intensity associated with solar flares.- II. Expected geographical distribution of solar-flare increases if these come from the sun.- F. Summary of results up to the Geophysical Year.- Second part: Results obtained in the International Geophysical Year and afterwards.- G. Solar cycle variations.- I. Results from ionization chambers and neutron monitors.- II. Results from high altitude observations.- H. Forbush decreases.- I. Results from continuous monitors.- II. Results from satellites and space probes.- I. Solar flare effects.- I. Results from ground level monitors.- II. Results from other methods of detection.- References.- Magnetic Properties of Rocks and Minerals.- I. Magnetism of rock-forming minerals.- II. Magnetic properties of assemblage of small grains of ferrimagnetic minerals.- III. Remanent magnetism of rocks.- References.- Sachverzeichnis (Deutsch-Englisch).- Subject-Index (English-German).