ADVERTISEMENT, 



The following Catalogue of Mineral Species has been prepared 

 by Mr. Egleston, at the request of the Institution, for the purpose 

 of facilitating the arranging and labelling of collections, and the 

 conducting of exchanges, as well as of presenting in a compact 

 form an outline of the science of mineralogy as it exists at the 

 present day. 



In labelling collections it is considered important to give the 

 chemical composition as well as the names, and hence the formulae 

 have been added. 



Some doubt was at first entertained as to the system of classi- 

 fication which ought to be adopted; but after due consideration 

 it was concluded to make use of that followed by Professor Dana, 

 in the last edition of his Manual of Mineralogy. "Whatever differ- 

 ence of opinion may exist as to the best classification, the one 

 here employed is that which will be most generally adopted in this 

 country, on account of the almost exclusive use of Professor 

 Dana's excellent Manual. 



The Institution is under obligations to Prof. Dana, Prof Brush, 

 Dr. Genth, and other gentlemen, for their assistance in perfecting 

 the work, and carrying it through the press. 



Copies of the Catalogue, printed on one side only, to be cut 

 apart for labels, can be furnished on application. 



JOSEPH HENRY, 



Secretary S. I. 

 Smithsonian Institution, 

 June, 1863. 



(iii) 



