PUBLICATIONS OF THK SMITHSONIAN INSTITUTION. 431 



under the direction and at the expense of the Smithsonian Institution. By John 

 Downcs. 1848. 4to., pp. 24. 



10. Occultations visible in the United States during the year 1850. Com- 

 puted bv John Downe?, at the expense of the fund appropriated by Congress for 

 the estabhshment of a Nautical Almanac, and published by the Smithsonian 

 Institution. 1849. 4to., pp. 26. 



These three papers by Mr. Downes, Nos. 8, 9, 10, were not published in the series of 

 Coutributions. 



11. Occultations visible in the United States during the year 1851. Com- 

 puted by John Downes, at the expense of the fund appropriated by Congress for 

 the establishment of a Nautical Almanac, and published by the Smithsonian 

 Institution. [October,] 1850. 4to., pp. 26. (S. C. ii.) 



12. On the vocal sounds of Laura Bridgeman, the blind deaf mute at Boston ; 

 compared with the elements of phonetic language. By Francis Lieber. [1850.] 

 4to., pp. 32, and one plate. (S. C. ii.) 



13. Contributions to the physical geography of the United States. Part I. 

 On the physical geography of the Mississippi valley, with suggestions for the 

 improvement of the navigation of the Ohio and other rivers : By Charles Ellet, 

 jr., civil engineer. Received September 17, 1849. [1850.] 4to., pp. 64, 

 and 1 plate. (S. C. ii.) 



14. A Memoir on 3Iosasaurus, and the three allied new genera, Ilolcodus, 

 Conosaunis, and Amplwrosteus, By Robert W. GiJabes, M. D. Received 

 November 15, 1849. [November, 1850.] 4to., pp. 14, and 3 plates. (S. C. ii.) 



15. Aborig-inal monuments of the State of New York. Comprising the results 

 of original surveys and explorations ; with an illustrative appendix. By E. G. 

 Squier, A. M. Accepted for publication, October 20, 1849. [1850.] 4to., pp* 

 188, 14 plates and 72 woodcuts. (S. C. ii.) 



16. The classification of insects from embryological data. By Professor 

 Louis Agassiz. [Presented to the American Association for the advancement of 

 science, at Cambridge, August, 1849. J Received March 6, 1850. [1850.] 

 4to., pp. 28, and one plate. (S. C. ii.) 



17. Memoir on the explosiveness of nitre, with a view to elucidate its agency 

 in the tremendous explosion of Jidy. 1845, in New York. By Robert Hare, M.D. 

 Accepted for publication, October, 1849. [1850.] 4to., pp. 20. (S. C. ii.) 



18. Report on the history of the discovery of Neptune. By Benjamin 

 Apthoi'p Gould, jr. 1850. 8vo., pp. 5<o. 



19. Directions for meteorological observations, intended for the first class 

 of observers. [By Arnold Guyot.] 1850. 8vo., pp. 40, and 9 woodcuts. 



20. Microscopical examination of soundings, made by the United States Coast 

 Survey off the Atlantic coast of the United States. By Professor J. W. Bailey. 

 [January, 1851.] 4to., pp. 16, and 1 plate. (S. C. ii.) 



21. Fourth annual report of the Board of Regents of the Smithsonian Insti- 

 tution, to the Senate and House of Representatives, showing the operations, 

 expenditures, and condition of the Institution during the year 1849. 31st Con- 



