CONTENTS. 



Advertisement 

 ARTICLE I. 



PAGE 



vii. 



ARTICLE II. 



ARTICLE III. 

 ARTICLE IV. 

 ARTICLE V. 

 ARTICLE VI. 

 ARTICLE VII. 

 ARTICLE VIII. 



ARTICLE IX. 



ARTICLE X 

 ARTICLE XL 



The Mollusks of Western North America. By 

 Philip P. Carpenter, B.A., Ph.D. Embracing the 

 Second Report made to the British Association on 

 this subject, with other papers ; reprinted by per- 

 mission, with a General Index. December, 1872. 

 Pp. 446. 

 Arrangement op the Families of Mollusks. Pre- 

 pared for the Smithsonian Institution by Theodore 

 Gill, M.D., Ph.D. February, 1871. Pp.65. 

 Instructions for Observations of Thunder Storms. 



By Prof. Joseph Henry. P. 1. 

 Circular relative to Heights. By Prof. Joseph 



Henry. Pp. 2. 

 Directions for constructing Lightning-Rods. By 



Prof. Joseph Henry. Pp. 3. 

 Queries relative to Tornadoes. By Prof. Joseph 



Henry. Pp. 4. 

 Questions relative to the Food Fishes of the Uni- 

 ted States. By Prof. S. F. Baikd. Pp. 7. 

 Memoranda of Inquiry relative to the Food Fishes 

 of the United States. By Prof. S. F. Baird. 

 Pp. 5. 

 , List of the Institutions, Libraries, Colleges, and 

 OTHER Establishments in the United States in 

 correspondence with the Smithsonian Institution. 

 July, 1872. Pp. 255. 

 . List of Foreign Correspondents of the Smithsonian 

 Institution. Corrected to January, 1872. [Fourth 

 Edition.] April, 1872. Pp.96. 

 . Check List of Publications of the Smithsonian In- 

 stitution, July, 1872. Pp. 22. 



