xvi ABBREVIATIONS. 



Trans. Min. Asso. and Inst., Cormvall. Transactions of the Mining As- 

 sociation and Institute of Cornwall. Tuckingmill, Camborn, England. 

 Trans. N. Y. Acad. of Sci. Transactions of the New York Academy of 



Sciences, formerly the Lyceum of Natural History. 

 Zeit. d. d. g. Ges. Zeitschrift der deutschen geologischen Gesellschaft. 



Berlin, Germany. 

 Zeitsch. f. B., H. und S. im P. St. Zeitschrift fur Berg-, Huetten-, und 



Salinenwesen im Preussischen Staat. Berlin, Germany. 

 Zeitschr. f. Krys. Zeitschrift fur Krystallographie. Munich, Germany. 

 The remaining abbreviations are deemed self-explanatory. Tne num- 

 bering of the paragraphs is on the following principle : The first digit 

 Tefers invariably to the part of the book, the second two digits to the 

 chapter, and the last two to the paragraph of the chapter. 



