814. NEW YOEK STATE MUSEUM 



1 



Silica .5 



Iron oxid and alumina 1.3 



Lime carbonate 88 . 67 



Magnesium carbonate 9.53 



2 





1. 



12 



1. 



89 



YG. 



48 



19. 



9Y 



100 101.11 



At Gouverneur extensive quarries have been opened for ob- 

 taining marble, and much, of the refuse is used for lime. This 

 stone often runs low in impurities, as indicated by the following 

 analyses made by J. D. Irving: 



Silica 1.85 



Alumina .23 



Ferric oxid .38 



Lime carbonate 92 . 29 



Magnesium carbonate 4.28 



99.03 



The crystalline limestone is well exposed at Harrisville (1^. Y.) 

 in the quarries of the Harrisville marble co., which lie about half 

 a mile from the Carthage and Adirondack railroad. I' he 

 rock there approaches very closely in composition to that at 

 Gouvemeur. There is a considerable ledge of crystalline lime- 

 stone on the Hungerford farm, near Lewisburg, about 4-J miles 

 north of the natural bridge. It is rather far from a railroad, but 

 it has been estimated that it could be put on the car at !N^atural 

 Bridge for $1.35 a ton. The stone is coarsely granular but not 

 very hard. Certain portions of the rock are very white, evi- 

 dently quite pure but rather free from silica. Other portions 

 contain an abundance of mica grains. 



The following analysis of these white dolomites was made by 

 G. J. Donohue and furnished to the writer by C. Graves of 

 :^ratural Bridge (N. Y.) 



