ANNUAL 



O F 



SCIENTIFIC DISCOVERY: 



O R , 



YEAR-BOOK OF FACTS IN SCIENCE AND AET 



FOR 1865. 



EXHIBITING THK 



HOST IMPORTANT DISCOVERIES AND IMPROVEMENTS 



IN 



MECHANICS, USEFUL ARTS, NATURAL PHILOSOPHY, CHEMISTRr, 



ASTRONOMY, GEOLOGY, ZOOLOGY, BOTANY, MINERALOGY, 



METEOROLOGY, GEOGRAPHY, ANTIQUITIES, ETC. 



TOGETHER WITH 



NOTES ON THE PROGRESS OF SCIENCE DURING TOE YEAR 1864; A LIST 



OF RECENT SCIENTIFIC PUBLICATIONS; OBITUARIES OF 



EMINENT SCIENTIFIC MEN, ETC. 



EDITED BT 



DAVID A. WELLS, A.M.,M.D., 



AUTHOR OF PRINCIPLES OF NATURAL PHILOSOPHY, PRINCIPLES OF CHEMISTRY, 



FIRST PRINCIPLES OF GEOLOGY, ETC. 



BOSTON: 



G O IT L r> AND LINCOLN. 



f,0 WASHINGTON STREET. 



NEW YORK: SHELDON AND COMPANY. 



CINCINNATI : GEORGE S. BLANCIIARD. 



LONDON: TRUBNER & CO. 



18G5. 



