On the Variation of Species, with Especial Reference to the Insecta

Followed by an Inquiry into the Nature of Genera

On Germinal Selection as a Source of Definite Variation

The Variation of Animals and Plants under Domestication — Volume 1

Are the Effects of Use and Disuse Inherited?

An Examination of the View Held by Spencer and Darwin

The Variation of Animals and Plants under Domestication

The Variation of Animals and Plants under Domestication — Volume 2

The Variation of Animals and Plants Under Domestication, Volume II (of 2)

Problems of Genetics

The Variation of Animals and Plants Under Domestication, Vol. I.