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 Aristotle
 Baker, Samuel White, Sir, 1821-1893
 Burgess, Thornton W. (Thornton Waldo), 1874-1965
 Darwin, Charles, 1809-1882
 Fabre, Jean-Henri, 1823-1915
 Huxley, Thomas Henry, 1825-1895
 Long, William Joseph, 1867-1952
 Roosevelt, Theodore, 1858-1919
 Seton, Ernest Thompson, 1860-1946
 Stowe, Harriet Beecher, 1811-1896


 An Anatomical Disquisition
 Respiration a Combustion
 The Mutual Relations of Forms in Organized Beings