| Aristotle, Historia Animalium, translated by D’Arcy Wentworth Thompson. |
Historia Animalium. |
| Castle, W. E., Genetics and Eugenics. |
Genetics and Eugenics. |
| Conklin, Edwin Grant, The Direction of Human Evolution. |
Evolution. |
| Darwin, Emma, A Century of Family Letters, two volumes. |
Family Letters. |
| Darwin, The Life and Letters of Charles Darwin, two volumes. |
Life. |
| De Vries, Hugo, Species and Varieties, Their Origin by Mutation. |
Species and Varieties. |
| Goncourts, Edmond et Jules, Journal des Goncourts, nine volumes. |
Goncourts, Journal. |
| Gray, Asa, Letters of, edited by Jane Loring Gray, two volumes. |
Gray Letters. |
| Grant Duff, Sir Mountstuart E., Notes from a Diary, fourteen volumes, 1851-1901. |
Grant Duff. |
| Huxley, Thomas H., Darwiniana (the second volume of Collected Essays). |
Darwiniana. |
| Huxley, Thomas H., Life and Letters of, by his son Leonard, two volumes. |
Huxley, Life. |
| Lull Richard, Harry Burr Ferris, George Howard Parker, James Rowland Angell, Albert Galloway Keller, Edwin Grant Conklin, The Evolution of Man. |
Lull. |
| Morgan, Thomas Hunt, Evolution and Adaptation. |
Evolution and Adaptation. |
| Osborn, Henry Fairfield, The Earth Speaks to Bryan. |
The Earth Speaks. |
| Osborn, From the Greeks to Darwin. |
Greeks to Darwin. |
| Osborn, Henry Fairfield, Impressions of Great Naturalists. |
Great Naturalists. |
| Parker, George Howard, What Evolution Is. |
What Evolution Is. |
| Pearson, Karl, The Grammar of Science. |
Grammar of Science. |
| Thoreau, Henry, Journal, fourteen volumes. |
Journal. |
| Vallery-Radot, Pasteur. |
Vallery-Radot, Pasteur. |
| Wallace, Alfred Russell, My Life, two volumes. |
Wallace, Life. |
| Whitehead, Alfred North, Science and the Modern World. |
Science and the Modern World. |