O the Effects of Image Motion on the Accuracy of Measurement of a Flashing Satellite
O the Geomagnetic Storm Effect
O the Gradient Line of the Earth's Zonal Gravitational Potential
O the Increase of the Earth's Dipole Moment
O the Ionization Produced by Gamma Radiation from the Ground and from the Atmosphere
O the Natural Radioactivity in the Air
O the Production of Glow Discharges in the Ionosphere by Winds
O the Radioactivity of Atmospheric Precipitates
O the Rate of Ion Formation at Ground Level and at One Meter above Ground
O the Relation Between Variations of the Earth's Magnetic Field and Variations of the Large-Scale Atmosphere Circulation
O the Theory of the First Phase of a Geomagnetic Storm: a New Illustrative Calculation Based on AN Idealised (plane not Cylindrical) Model Field Distribution
O the Visual Tracking of Two Bright Satellites from C-130-TYPE Aircraft
O Theories of Rotating Convection Zones
O time and change!
O transport across the polar cap
O triclusters revisited: Classical MD and quantum cluster results for glasses of composition (Al2O3)2(SiO2)
O uso de cameras de video portateis CCD na astronomia.
O Variations of the Geomagnetic Field, Fluid Motions, and the Rate of the Earth's Rotation
O ver de contimiiteit van den gas- en vloeistofiocstand Academisch proefschrift
O VI /lambda equals 1032 A/ profiles in and above an active region prominence, compared to quiet sun center and limb profiles