Essay on the Trees and Shrubs of the Ancients: Being the Substance of Four Lectures Delivered Before the University of Oxford, Intended to Be Supplementary to Those on Roman Husbandry, Already Published

An Introduction to the Atomic Theory

A Description of Active and Extinct Volcanos, of Earthquakes, and of Thermal Springs: With Remarks on the Causes of These Phµnomena, the Character of Their Respective Products, and Their Influence on the Past and Present Condition of the Globe

Journal of a Tour Through the United States, and in Canada, Made During the Years 1837-38

Remarks on the Final Causes of the Sexuality of Plants, with Particular Reference to Mr. Darwin's Work on the Origin of Species: Being the Substance of a Paper Read Before the Natural History Section of the British Association for the Advancement of