Harvard Classics Volume 30

Contents:1. The Forces of Matter and The Chemical History of a Candle, by Michael Faraday2. On the Conservation of Force and Ice and Glaciers, by Hermann von Helmholtz3. The Wave Theory of Light and The Tides, by Lord Kelvin4. The Extent of the Universe, by Simon Newcomb5. Geographical Evolution, by Sir Archibald Geikie