Harvard Classics Volume 30

Contents:

1. The Forces of Matter and The Chemical History of a Candle, by Michael Faraday

2. On the Conservation of Force and Ice and Glaciers, by Hermann von Helmholtz

3. The Wave Theory of Light and The Tides, by Lord Kelvin

4. The Extent of the Universe, by Simon Newcomb

5. Geographical Evolution, by Sir Archibald Geikie