CONTENTS. 



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ARTICLE I. On Recent Improvements in the Chemical Akts. By 

 Prof. James C. Booth and Campbell Morfit. 1852. 

 Pp. 216. 



ARTICLE II. Extracts from the Proceedings of the Board of Re- 

 gents of the Smithsonian Institution, in relation 

 to the Electro-Magnetic Telegraph. (Reprinted 

 from Proceedings of the Board of Regents for 1857.) 

 Pp. 40. 



ARTICLE III. Catalogue of Portraits of North American Indians, 

 with Sketches of Scenery, etc. Painted by J. M. 

 Stanley. Deposited vrith the Smithsonian Institu- 

 tion. December, 1852. Pp. 76. 



ARTICLE IV. Catalogue op North American Birds, chiefly in thb 

 Museum of the Smithsonian Institution. By Spen- 

 cer F. Baird. 1859. First octavo edition. Pp. 24. 



ARTICLE V. Catalogue of North American Reptiles in the Museum 

 OF the Smithsonian Institution. Part I. Serpents. 

 By S. F. Baird and C. Girard. January, 1853. 

 Pp. 172. 



ARTICLE VI. Check List of the Shells of North America. Pre- 

 pared for the Smithsonian Institution by Isaac Lea, 

 P. P. Carpenter, W. Stimpson, W. G. Binney, and 

 Temple Prime. June, 1860. Pp. 44. 



