[SCIENCE AND NATURAL HISTORY]. Group of Nearly 21 Volumes of Scientific Books. [V.p., ca. 19th ? 20th centuries]. 8vos and 4tos. Most in publisher?s bindings, a few modern titles in dust jackets (some wear, soiling, ownership markings). Generally very good. VARIOUS EDITIONS. Some titles include: Sir Isaac Newton?s Mathematical Principles of Natural Philosophy and his System of the World (1946); British Botanical and Horticultural Literature Before 1800 (3 volumes); A Guide to Health or Botanic Family Physician; The Young Man?s Counsellor or Sketches and Illustrations of The Duties and Dangers of Young Men; A Guide to Health Being an Exposition of the Principles of the Thomsonian System of Practice; A Manual of the Antiquity of Man; British Anatomy 1525-1800 a Bibliography; The Occult Sciences in the Renaissance; Manual of Botany for North America? Measurements: 9 x 7 x 2?.