IV PREFACE. 



The list of American localities appended to the work, the de« 

 scriptio.is of mineralogical implements, and the notice of foreign 

 weights, measures and coins, will be found convenient to the student. 



The ajthor must refer to his larger work for more minute infor- 

 mation on the localities of minerals and the associations of species — 

 for full lists of synonyms — a more complete account of crystal- 

 ography and its details, and more numerojs analyses, with their 

 authorities. ***** * 



PREFACE TO THE NEW EDITION. 



In bringing this Manual up to the present state of the science, 

 numerous changes and additions have been required. The arrange- 

 ment, however, remains unaltered, except in the order of some of 

 the metals. , The Table of American localities has been nearly 

 doubled in length, giving it the completeness it has in the author's 

 "Treatise on Mineralogy." A chapter has also been added on the 

 chemical composition and formulas of minerals, in which the sub- 

 ject is explained with simple illustrations, and a list of the more 

 prominent species with their chemical formulas is given, following 

 the order of the descriptive part of the work. 



New Haven, 1867. 



