By Hertwig, Richard, 1850-1937 / Kingsley, J. S. (John Sterling), 1854-1929 . Genre Zoology . Names animals / animal / order / called / vertebrates and 8037 more

Genre Gardening / Periodicals . Names fruit / plants / soil / roots / wood and 5114 more

By Hough, Romeyn Beck, 1857-1924 / Hough, Marjorie G . Genre n------ / Trees / North America / Wood . Names leaves / wood / flowers / fruit / sp and 1716 more

By McCabe, Joseph, 1867-1955 . Genre Evolution . Names life / animal / animals / nebula / idea and 740 more

Genre Smithsonian Institution / Periodicals / Smithsonian Institution.Archives / Periodicals / Discoveries in science and 1 more . Names american / america / life / idea / virginia and 3183 more

By Poulton, Edward Bagnall, 1856- / Darwin, Charles, 1809-1882 . Genre Darwin, Charles1809-1882 / Natural selection . Names life / animals / plants / none / animal and 867 more

By Tweedy, Frank, 1854-1937 . Genre Plants / Yellowstone National Park . Names areas / sulphur / alpina / area / canadensis and 1894 more

Genre Science / Periodicals . Names miscellaneous / island / area / type / american and 6548 more

Genre Science / Periodicals . Names order / axis / sea / electron / s 6 and 2676 more

By Ainsworth Davis, J. R. (James Richard), 1861-1934 . Names animals / vertebrate / order / animal / america and 2663 more