142 XEW YORK STATE MUSEUM 



An analysis of the plaster made for this company shows 



Sulfate of lime 



80.78 



Carbona^te of lime 



1.76 



" magnesium 



3 



Phosphate of lime 



.43 



Sand 



3.32 



Organic matter 



.18 



Chlorin, potash and clay 



10.05 



Total 99 . 52 



The general color of the gypsum rock when first quarried is a 

 dark gray, but on exposure to the air, it becomes very much 

 lighter. Occasionally plates of selenite intermingled with impure 

 rock are found, and at times well formed crystals and large plates 

 of selenite are encountered. 



In this vicinity are several old quarries which are not worked 

 at the present time. 



Garbutts. At Garbutts are located the mines and mill of the 

 Lycoming Calcining Co., which began operations at this place in 

 1900. Before that time a mine was operated by Mr John Gar- 

 butt for many years, and the output was disposed of entirely 

 ill the form of land plaster. The old mine was reached by a 

 shaft; but, with the beginning of work by the new company, a 

 tunnel was driven into the gypsum from the bank of Allen's 

 creek, and the creek was bridged so that the cars could be 

 hauled directly from the mine to the mill. There are three 

 deposits of gypsum with intervals of about 6 feet between them. 

 Tw o mines have been opened into the upper deposit, and recently 

 a tunnel has been driven into the second bed. The waste rock 

 is carefully corded up in the mine in such a way as to help sus- 

 tain the roof, so that a larger proportion o'f the gypsum can be 

 removed than could otherwise be taken out. The quality of the 

 gypsum is the same as that of the Wheatland rock, and little 

 difference can be detected between this rock and the product of 

 the mines at Oakfield and Indian Falls. 



