12 PUBLICATIONS OP 



114. Sonntag. — Observations on Terrestrial Magnetism in 

 Mexico ; conducted under the direction of Baron Yon Miiller ; 

 with Notes and Illustrations of the Volcano Popocatapetl and its 

 vicinity. By August Sonntag. February, 1860. 4to. pp. 92, 

 and one plate. (S. C. xi.) Price 75 cents. 



PHYSICS. 



36. Secchi. — Researches on Electrical Rheometry. By A. 

 Secchi. May, 1852. 4to. pp. 60, and 3 plates. (S. C. in.) Price 

 60 cents. 



115. Extracts from the Proceedings of the Board of Regents of 

 the Smithsonian Institution, in relation to the Electro-Magnetic 

 Telegraph. (Reprinted from Proceedings of the Board of Re- 

 gents for 1857.) 1861. 8vo. pp. 40. (M. C. n.) 



CHEMISTRY AND TECHNOLOGY. 



17. Hare. — Memoir on the Explosiveness of Nitre, with a view 

 to elucidate its agency in the tremendous explosion of July, 1845, 

 in New York. By Robert Hare, M. D. 1850. 4to. pp. 20. (S. 

 C. ii.) Price 10 cents. 



88. Gibbs and Genth. — Researches on the Ammonia-Cobalt 

 Bases. By Wolcott Gibbs and Frederick Aug. Genth. Decem- 

 ber, 1856. 4to. pp. 72. (S. C. ix.) Price 50 cents. 



27. Booth and Morfit. — On Recent Improvements in the 

 Chemical Arts. By Prof. James C. Booth and Campbell Morfit. 

 1852. 8vo. pp. 216. (M. C. n.) Price 75 cents. 



ETHNOLOGY AND PHILOLOGY. 



71. Haven. — Archaeology of the United States; or, Sketches, 

 Historical and Bibliographical, of the Progress of Information and 

 Opinion respecting Vestiges of Antiquity in the United States. 

 By Samuel F. Haven. July, 1856. 4to. pp. 172. (S. C. vm.) 

 Price $1 50. 



1. Squier and Davis. — Ancient Monuments of the Missis- 

 sippi Valley; comprising the results of extensive original surveys 



