NEW YORK MINERAL LOCALITIES 11 



occurring at each locality. The fourth column contains descrip- 

 tive notes regarding such crystallographic, structural, or other 

 features as may be characteristic of the mineral occurrence. 

 The sixth column is reserved for a quality mark which is as- 

 signed to certain occurrences to indicate the mineralogic quality 

 or commercial importance of the material as follows: 



XX indicates very fine specimens 

 X indicates fine specimens 



* indicates that the mineral has been mined or quarried 

 t indicates that the mines or quarries are no longer operated 

 The absence of any of the above symbols in the sixth column 

 opposite any given species indicates the occurrence of specimens 

 of ordinary grade. 



In the seventh column is noted the character of the rock in 

 which ihe mineral species occurs, this in many cases being com- 

 mon to all the species found in any locality. 



The eighth column contains a list of the mineral species asso- 

 ciated with the mineral noted in the third column. This in many 

 instances constitutes a genetic association which is of interest 

 from the standpoint of the formation of minerals. 



The numbers and letters given in the ninth column refer to the 

 published and unpublished authorities as given in the following 

 bibliography and list of unpublished authorities. 



BIBLIOGRAPHY 



1 Akerly, Samuel. On the Geology and Mineralogy of the Island of New 



York. Am. Min. Jour. 1814. 1:191. 



2 Bailey, S. C. H. On the Minerals of New York Island. N. Y. Lyceum Nat. 



Hist. Ann. Nov. 1865. v. 8. 



3 Beck, Jj. C. Report on the Mineralogical and Chemical Departments of the 



N. Y. Mineralogical and Geological Survey. N. Y. Min. Rep't. 1837. 

 p. 17; 1838. p. 7; 1839. p. 9. 



4 The Mineralogy of N. Y, State by Counties. N. Y. Min. Rep't. 



1840. p. 54. 



5 Mineralogy of New York. 1842. 



6 Analysis of Hypersthene of New York. Am. Jour. Sci. Ser. 1. 



1843. 44:35. 



7 Analysis of Allanite of Monroe, N. Y. Am. Jour. Sci. Ser. 1. 



1843. 44:37. 



8 Notices of some Trappean Minerals in New Jersey and New 



York. Am. Jour. Sci. Ser. 1. 1843. 44:54 



