As of January 1, 2019, copyrighted works from 1923 are now in the public domain, including 3 important biology textbooks. One, New Essentials of Biology, is by “Scopes’ textbook” author George W. Hunter. More on it when its companion, New Civic Biology, falls out of copyright in two years. The two others, Henry Linville’s Biology of Man and Other Organisms and Gilbert H. Trafton’s Biology of Home and Community, are an interesting study in contrast. Trafton is gentle and thorough, Linville wildly eugenic – See chapter: “Up From Savagery” (p. 154-180).