.5 



1.12 



1.3 



1.89 



88.C7 



7G.48 



9.53 



19.97 



a JfO&K mail MUSEUM 



BOioa 



lr<>n OXld anil alumina 



Lime carbonate 



Magnesium carbonate 



100 101.11 



\ f rinnvornenr extensive quarries have been opened for ob- 

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

 D runs l<>w in impurities, as indicated by the following 

 an made by J. D. Irving: 



Silica 1.85 



Alumina .23 



•nc oxid .38 



Lime carbonate 92 . 29 



Magnesium carbonate 4. 28 



99.03 



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

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

 a mile from the Carthage and Adirondack railroad. The 

 rock there approaches very closely in composition to that at 

 Gouverneur. There is a considerable ledge of crystalline lime- 



:ie on the Ilunirerford farm, near Lewisburg, about 4rJ miles 

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

 it lias been estimated that it could be put on the car at Natural 

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



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



tlv 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 



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

 iral Bridge (N. Y.) 



