174 NEW YORK STATE MUSEUM 



The company has erected a mill on the property in which it 

 grinds all the spar, shipping the ground material to tile, enamel 

 ware and glass manufacturers. The capacity is 35 or 40 tons a 

 day. The equipment for final grinding consists of ball mills. 

 Auto trucks are used to transport the material to Bedford station, 

 the shipments being made in bags. 



Bullock quarry 



The firm of P. H. Kinkel & Sons opened a new quarry in 191 2 

 on the Bullock property about 2 miles south of their main quarries. 

 The property is west of the Hobby quarry. The occurrence is 

 very similar to the latter in the quality of the product but is not 

 apparently connected with it. It consists of a dike 30 feet wide 

 which strikes northeast and dips 8o° to the northwest. The wall 

 rock exposed on both sides is a mica schist, garnetiferous near the 

 contact with the pegmatite, and resembling the Manhattan schist 

 in its general appearance. 



The pegmatite shows a high degree of mineral segregation with 

 very little of pegmatitic intergrowth. It is mostly feldspar of a 

 cream or buff color, which on examination is seen to be an inter- 

 growth of microcline and albite with the former predominant in 

 the proportion of 2 or 3 to 1. It occasionally shows good crystal 

 boundaries. The individuals measure as large as 2 feet or so in 

 length, but are mostly smaller. The quartz has a smoky color and 

 near the contact shows crystals of garnet. Tourmaline and yel- 

 lowish mica are in subordinate quantity. The feldspar is readily 

 separated with little waste, so as to be shipped as no. 1 grade. 



The opening is on the side of a hill and presents a face about 

 30 feet high. It can be deepened considerably before it is neces- 

 sary to provide artificial drainage. The product has been shipped 

 crude for abrasive uses, but is an excellent material for pottery 

 or glazing. It is noteworthy that the same varieties of feldspar 

 are represented as in the Bedford quarries, but occur in pegmatite 

 intergrowths and not segregated. 



Hobby quarry 



The Hobby quarry lies a little east of the Bullock beside the 

 Mianus river. It was worked for a time by Otto Buresch and later 

 by P. H. Kinkel & Sons, but for the last few years has been idle. 

 It appears to be based on a large body, though the contacts with 

 the country rocks are not shown. The working is perhaps 150 feet 

 long by 100 feet wide. 



