12 



delicate branch have enrolled themselves 

 in the School of Mines at Paris. Many 

 new mineral species have been firmly esta- 

 blished, and others which were doubtful 

 have been re-examined, and restored to 

 their proper places in the system. The 

 analyses of our president Dr. Torrey, of 

 Seybert, Keating, Bowen, Vanuxem, and 

 others, have thrown much light upon the 

 Mineralogy of our country, and the pages of 

 the American Journal of Science and the Arts 

 bear frequent and honorable testimony to 

 the industry and talents of our Mineralo- 

 gists. Nor have the crystallographical 

 characters been neglected. A profound 

 acquaintance with this subject has enabled 

 Dr. Troost of Philadelphia to discover a 

 new form of Cymophane and Pyroxene^ of An- 

 dalusite^ Laumonite^ Apophylite, &;c. and to 

 detect the identity of some supposed new 

 minerals with other species previously well 

 known and described. Among those works 

 which have contributed, in no small degree, 

 to give an impulse to Mineralogical re- 

 searches, are the various local catalogues of 

 minerals which have been occasionally pub- 

 lished within the last few years. Of these, 



