TABLE OF CONTENTS. ARTICLE I. (358.) THE CONSTANTS OF NATURE. Part IV. ATOMIC WEIGHT DETERMINATIONS: A DIGEST OF THE INVESTIGA- TIONS PUBLISHED SINCE 1814. By GEORGE F. BECKER. ARTICLE II. (441.) THE CONSTANTS OF NATURE. Part V. A RECAL- ARTICLE III. (437.) CHECK LIST OF PUBLICATIONS OF THE SMITHSONIAN INSTITUTION, December, 1881. 1881. Pp. 22. ARTICLE IV. (478.) CATALOGUE OF PUBLICATIONS OF THE SMITHSONIAN INSTITUTION (1846-1882) WITH AN ALPHABETICAL INDEX OF ARTICLES IN THE SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE, MISCELLANEOUS COLLECTIONS, ANNUAL RE- PORTS, BULLETINS AND PROCEEDINGS OF THE U. S. NATIONAL V |