<a href="//commons.wikimedia.org/wiki/Amos_Eaton" title="Amos Eaton">Amos Eaton</a> illustration from Popular Science Monthly Vol 38 (1891).  This illustration was also used in <i>Pioneers of Science in America</i>
From original engraving by A. H. Richie.
1891
Popular Science Monthly Vol 38, 1890-91