Science

The Voyage of the Beagle

CNUT

The Warlord of Mars

Wildflowers of the Mountain West

The Teeth of the Tiger

The Moon: A Popular Treatise

The World of Flying Saucers: A Scientific Examination of a Major Myth of the Space Age

The Principle of Relativity

Comet Lore

Researches Chemical and Philosophical

Irritability: A Physiological Analysis of the General Effect of Stimuli in Living Substance

Field Book: Pennsylvanian Plant Fossils of Illinois

The Microscope. Its History, Construction, and Application 15th ed

Sewage Disposal on the Farm, and Protection of Drinking Water

The Dominion Astrophysical Observatory, Victoria, B.C

Selenium cells

Pyrotechnics

Phrenology Examined

Captain Paul Watson Interview

Landscape in History, and Other Essays