CONTENTS OF VOLUME XXXVIII. 



NUMBER I. 



Art. I. A letter to Prof. Faraday, on certain Theoretical Opin- 

 ions ; by Prof. R. Hare, M. D., - - - 1 

 II. Analysis of Sea Water as it exists in the English Chan- 

 nel near Brighton ; by G. Schweitzer, M. D., - 12 



III. On the Halo or Fringe which surrounds all Bodies ; by 



Mrs. Mary Griffith, - - - - 22 



IV. On the use of the Galvanic Battery in Blasting; by 



Hamilton K. G. Morgan, - - - 33 



V. On the Tails of Comets ; by William Mitchell, - 35 

 VI. A Gissi or Kissi Vocabulary ; by Prof. J. W. Gibbs, 41 



VII. A Vai or Vey Vocabulary ; by the Same, - - 43 



VIII. A Mendi Vocabulary ; by the Same, - - 44 



IX. Vegetable Organography and Physiology, or the For- 

 mation and Vital Functions of Plants ; by Horace 

 Green, M. D., - - - - - 49 



X. Practical Remarks on Gems, especially on some of those 



found in the United States ; by Thomas Taber, - 61 

 XI. On the Connexion between the theory of the Earth and 

 the Secular Variations of the Magnetic Needle ; by 

 Prof. John H. Lathrop, - - - - 68 



XII. Notices of Tornadoes, &c. ; by Prof. R. Hare, M. D., 73 



XIII. On the Silurian System, with a Table of the Strata and 



Characteristic Fossils ; by T. A. Conrad, - - 86 



XIV. Abstract of the Proceedings of the Ninth Meeting of the 



British Association for the Advancement of Science, 93 



XV. Account of a Journey to the Coteau des Prairies, with a 

 description of the Red Pipe Stone quarry and Granite 

 Bowlders found there; by Mr. George Catlin, - 138 

 XVI. Auroras and Sunset, ----- 146 



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