TABLE OF CONTENTS. 



Article I. (358.) The Constants of Nature. Part IV. Atomic 

 Weight Determinations : A Digest of the Investiga- 

 tions PUBLISHED SINCE 1<S14. By George F. Becker. 

 1880. Pp. 152. 



Article II. (441.) The Constants of Nature. Part V. A Recal- 

 culation OF the Atomic Weights. By Frank Wiggles- 

 worth Clarke. 1882. Pp. 293. 



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 

 Knoavledge, Miscellaneous Collections, Annual Re- 

 ports, Bulletins and Proceedings of the U. S. National 

 Museum, and Report of the Bureau of Ethnology. 

 By AVilliam J. Rhees. 1882. Pp. 342. 



