Image from page 252 of "The practice of obstetrics, designed for the use of students and practitioners of medicine" (1910)

Image from page 45 of "Frost & fire : natural engines, tool-marks & chips : with sketches taken at home and abroad by a traveller" (1863)

Image from page 53 of "Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together wi

Image from page 195 of "History of the Connecticut Valley in Massachusetts, with illustrations and biographical sketches of some of its prominent men and pioneers" (1879)

Image from page 175 of "C. Hart Merriam papers : including correspondence, papers relating to career with the United States Biological Survey, 1798-1972 (bulk 1871-1942)" (1798)

Image from page 266 of "The natural history of plants, their forms, growth, reproduction, and distribution;" (1895)

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