by Erasmus Darwin
by Calvin Cutter
by Francis M. (Francis Marion) Walters
by Sarah F. (Sarah Frances) Buckelew, Margaret W. (Margaret Wiseham) Lewis
by Thomas Henry Huxley
by Winfield Scott Hall
by Erasmus Darwin
by Sydney Blanshard Flower
by Sir M. (Michael) Foster
by Alejandro Lipschütz
by Francis Gano Benedict, Thorne M. (Thorne Martin) Carpenter
by George Washington Crile
by Antoni van Leeuwenhoek
by Joseph C. (Joseph Chrisman) Hutchison
by Edward Morton
by Jane Andrews
by Jan Swammerdam
by Thomas Garnett
by F. W. (Frederick Walker) Mott