CONTENTS, 



PAGR 



MECHANICS AND USEFUL ARTS, . . . . . .13 



NATURAL PHILOSOPHY, . . . . . . . 103 



CHEMICAL SCIENCE, ........ 162 



GEOLOGY, MINERALOGY, AND PALEONTOLOGY, . . . 222 



BOTANY, .......... 289 



ZO5LOGY, ......... 307 



ASTRONOMY AND METEOROLOGY, ..... 335 



GEOGRAPHY AND ANTIQUITIES, 351 



PATENTS, .......... 369 



OBITUARY, 3*71 



RECENT SCIENTIFIC PUBLICATIONS IN THE UNITED STATES, . 372 



INDEX TO ARTICLES IN SCIENTIFIC JOURNALS AND REPORTS, . 374 



GENERAL INDEX, . 381 



