PEEFAOE. 



This Manual in its present shape is new throughout. In the reno- 

 vation it has undergone, new illustrations have been introduced, an im- 

 proved arrangement of the species has been adopted, the table for the 

 determination of minerals has been reconstructed, and the chapter on 

 rocks has been expanded to a length and fullness that renders it a 

 prominent part of the work. But while modified greatly in all its 

 parts, it is still simple in its methods of presenting the facts in crys- 

 tallography, and in all other explanations ; and special prominence is 

 given, as in former editions, to the more common minerals, with only 

 a brief mention of others. The old practical feature is retained of 

 placing the ores under the prominent metal they contain, and of giving 

 in connection some information as to mines and mining industry. 



The student is referred to the Text-book of Mineralogy, prepared 

 mainly by Mr. E. S. Dana, for a detailed exposition of the subject of 

 crystallography after Naumann's and Miller's systems, and also of 

 optical mineralogy and other physical branches of the science ; to 

 the Manual of Determinative Mineralogy and Blowpipe Analysis by 

 Professor George J. Brush, for a thorough work on the use of the 

 blowpipe, and complete tables for the determination of minerals ; 

 and to the author's Descriptive Mineralogy and its Appendixes for a 

 comprehensive treatise on all known minerals. 



JAMES D. DANA. 

 New Haven, Nov. 1, 1878. 



