The following books have been the constant companions of the author during the preparation of his “First Book in Organic Evolution”:—
- Grant Allen, The Colours of Flowers.
- A. C. Abbot, Principles of Bacteriology.
- Frank Baker, The Ascent of Man.
- Thomas Belt, Naturalist in Nicaragua.
- H. W. Bates, Naturalist of the Amazons.
- F. E. Beddard, Animal Coloration.
- A. H. Bradford, Heredity and Christian Problems.
- F. M. Balfour, A Treatise on Comparative Embryology.
- D. G. Brinton, Races and Peoples.
- P. C. Burt, A History of Modern Philosophy.
- Paul Carus, The Soul of Man.
- Paul Carus, The Ethical Problem.
- Paul Carus, The Idea of God.
- Paul Carus, Homilies of Science.
- Paul Carus, Fundamental Problems.
- Arthur Clarkson, A Text-Book of Histology.
- Edward Clodd, The Story of Creation.
- Edward Clodd, The Story of Primitive Man.
- Edward Clodd, A Primer of Evolution.
- Carpenter-Dallinger, The Microscope and its Revelations.
- A. De Quatrefages, The Natural History of Man.
- E. D. Cope, The Primary Factors of Organic Evolution.
- Charles Darwin, The Origin of Species.
- Charles Darwin, The Descent of Man.
- Charles Darwin, Animals and Plants under Domestication.
- J. D. Dana, New Text-Book of Geology.
- Bashford Dean, Fishes, Living and Fossil.
- J. W. Draper, History of the Intellectual Development of Europe.
- J. W. Draper, Conflict between Religion and Science.
- H. H. Donaldson, The Growth of the Brain.
- R. L. Dugdale, The Jukes.
- Henry Drummond, The Ascent of Man.
- Havelock Ellis, Man and Woman.
- Havelock Ellis, The Criminal.
- John Fiske, The Unseen World.
- John Fiske, The Idea of God.
- John Fiske, The Destiny of Man.
- John Fiske, Excursions of an Evolutionist.
- John Fiske, Myths and Myth-Makers.
- Enrico Ferri, Criminal Sociology.
- Sir W. H. Flower, Osteology of the Mammalia.
- Funk and Wagnall, Standard Dictionary of the English Language.
- Theodore Gill, The Families of Fishes.
- Theodore Gill, Articles on Fishes in the Riverside Natural History.
- John C. Galton, Ecker’s The Human Brain.
- Francis Galton, Hereditary Genius.
- Francis Galton, Natural Inheritance.
- Francis Galton, English Men of Science, their Nature and Nurture.
- C. Gegenbaur, Elements of Comparative Anatomy.
- J. M. Guyau, Education and Heredity.
- Geddes and Thomson, The Evolution of Sex.
- Harper’s Latin Dictionary.
- T. H. Huxley, Anatomy of Vertebrated Animals.
- T. H. Huxley, Man’s Place in Nature.
- T. H. Huxley, Origin of Species.
- T. H. Huxley and Martin, Practical Biology.
- T. H. Huxley, Science and Culture, and other Essays.
- Hertwig-Mark, Text-Book of Embryology.
- David J. Hill, Genetic Philosophy.
- Hertwig-Campbell, The Cell.
- Robert Hartman, The Anthropoid Apes.
- George Haslam, Ecker’s Anatomy of the Frog.
- Rev. W. Houghton, Sketches of British Insects.
- E. Klein, Micro-organisms and Disease.
- G. T. Ladd, Outlines of Physiological Psychology.
- Cesare Lombroso, The Man of Genius.
- Sir John Lubbock, The Beauties of Nature.
- Sir John Lubbock, Ants, Bees, and Wasps.
- Arnold Lang, Text-Book of Comparative Anatomy.
- Joseph Leidy, Fresh-water Rhizopoda of North America.
- Liddell and Scott, Greek-English Lexicon.
- Sir Charles Lyell, Antiquity of Man.
- Sir Charles Lyell, Principles of Geology.
- Joseph Le Conte, Evolution and its Relation to Religious Thought.
- Joseph Le Conte, Elements of Geology.
- C. S. Minot, Human Embryology.
- St. George Mivart, The Genesis of Species.
- St. George Mivart, Lessons in Elementary Anatomy.
- St. George Mivart, The Common Frog.
- St. George Mivart, The Cat.
- A. M. Marshall, Vertebrate Embryology.
- Henry C. McCook, American Spiders.
- F. Max Müller, Anthropological Religion.
- C. Lloyd Morgan, Animal Life and Intelligence.
- C. Lloyd Morgan, Animal Biology.
- O. T. Mason, Woman’s Share in Primitive Culture.
- Daniel Oliver, Lessons in Elementary Botany.
- Richard Owen, Anatomy of Vertebrates.
- A. S. Packard, Zoölogy.
- Parker and Haswell, Text-Book of Zoölogy.
- Oscar Peschel, The Races of Man.
- E. P. Poulton, The Colours of Animals.
- J. W. Powell, Truth and Error, or, The Science of Intellection.
- Th. Ribot, Heredity.
- Ernest Renan, The Life of Jesus.
- G. J. Romanes, Darwin and After Darwin.
- S. H. Reynolds, The Vertebrate Skeleton.
- Oscar Schmidt, The Mammalia.
- Oscar Schmidt, Descent and Darwinism.
- Schafer and Thane, Quain’s Elements of Anatomy.
- Karl Semper, Animal Life.
- Herbert Spencer, Principles of Biology.
- W. B. Scott, An Introduction to Geology.
- N. S. Shaler, First Book in Geology.
- J. B. Sutton, Evolution and Disease.
- R. S. Tarr, Elementary Geology.
- J. A. Thomson, Outlines of Zoölogy.
- E. B. Tylor, Anthropology.
- James Tyson, The Cell Doctrine.
- Lester F. Ward, Dynamic Sociology.
- Lester F. Ward, Outlines of Sociology.
- Alfred Weber, History of Philosophy.
- A. D. White, A History of the Warfare of Science with Theology.
- A. Weismann, Essays upon Heredity.
- A. Weismann, The Germ-Plasm.
- A. R. Wallace, The Malay Archipelago.
- A. R. Wallace, Darwinism.
- E. B. Wilson, The Cell in Development and Inheritance.
- R. Wiedersheim, Comparative Anatomy of Vertebrates.
- R. Wiedersheim, The Structure of Man.
- C. F. Winslow, Force and Nature.
- William Whewell, History of the Inductive Sciences.
- B. G. Wilder, Anatomical Technology.
- B. G. Wilder, Article “Brain,” Reference Handbook of the Medical Sciences.
- Ernst Ziegler, General Pathology.