TABLE OF CONTENTS.* 



ARTICLE I. Researches relative to the Planet Neptune. By Sears C. Walker, Esq. Pp. 60. 

 Sec. 1. Abstract of Events connected with the Discovery of Neptune, the Progress made 



in its Theory, and the Completion of the Theory of Uranus, . . 4 



Sec. 2. Detailed Account of the Discovery of the two Ancient Places of Neptune, 



observed by Lalande in May, 1795, . . . . 10 



Sec. 3. Computations confii-ming the Authenticity of Lalande's printed Observations, 23 

 Sec. 4. Subsequent Researches on the Orbit of Neptune, ... 27 



ARTICLE II. On the Vocal Sounds of Laura Bridgeman, the Blind Deaf Mute at Boston; 

 compared with the Elements of Phonetic Language. By Dr. Francis Lieber. 

 Pp. 32, and one plate. 



ARTICLE III. Microscopical Examination of Soundings made by the United States Coast 

 Survey, off the Atlantic Coast op the United States. By Prof. J. W. Bailey. 

 Pp. 16, and one plate. 



List of Species found in the different Lines of Soundings, . .4 



General Results obtained, . . . . . . .7 



Description of the most interesting Microscopic Forms found in the above men- 

 mentioned Soundings, ....... 9 



ARTICLE IV. Contributions to the Physical Geography of the United States. 



Part ]. On the Physical Geography of the Mississippi Valley, with suggestions as to 



the improvement of the Navigation of the Ohio and other Rivers. By 



Charles Ellet, C. E. Pp. 64, and one plate. 



Of the Ohio, ....... 1 



Tributaries of the Ohio, . . . . .12 



Of the Drainages of the Ohio, . . . . .19 



Discharges of the Ohio River at WheeUng, . . . 21 



Of the Floods of the Ohio, . . . . .44 



Water Power, ...... 55 



Of the proper application of Reservoirs to the improvement of Rivers, 56 

 Notes, ....... 59 



* Eiich article is paged^sepavately. 



