PROF. ARMSTRONG holds that Simpson's theory of the thunderstorm is invalid because its physical basis is unsound. He believes that it is not possible for water-drops to become electrically charged ...

S. Signal Service by Prof. Trowbridge on the subject of atmospheric electricity with a view to learn its value for meteorological purposes. The method employed was that known as the Thompson one ...

1. Adiabatic” Expansion: Paul Bunyan’s Bicycle Pump. 2. Atmospheric Electricity: Van de Graf generator shows inductive charging, breakdown, how a lightning rod works…. 3. Atmospheric Optics: 1/r^2 ...