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Essays on early ornithology and kindred subjects

James R. McClymont
Public domain

An Elementary Study of Insects

Leonard Haseman
Public domain

Ducks at a Distance A Waterfowl Identification Guide

Robert W. Hines
Public domain

The Doctrine of Evolution Its Basis and Its Scope

Henry Edward Crampton
Public domain

Development of the Digestive Canal of the American Alligator

Albert M. Reese
Public domain

The Dawn of Reason or, Mental Traits in the Lower Animals

James Weir
Public domain

Darwinism (1889)

Alfred Russel Wallace
Public domain

Darwiniana

Thomas Henry Huxley
Public domain

Darwiniana Essays and Reviews Pertaining to Darwinism

Asa Gray
Public domain

The Darwinian Hypothesis

Thomas H. Huxley
Public domain
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