26 Report on Building Stone of New York. 



to be raised, and the quarry is worked to advantage on account of 

 the little stripping and the ease with which the rock can be split. 

 The two new buildings of the college are built of this " bluestone," 

 dressed and laid in course work. 



Another quarry in the micaceous gneiss is seen at the south side of 

 Pelham avenue, near the College quarry, but it is small and not 

 worked to any extent. 



Hartsdale, Westchester County. — Near Hartsdale station, on 

 the Harlem railroad, a gneiss rock is quarried for the local market. 

 It has been used at White Plains in the court-house and jail build- 

 ings, and in the bank building near the court-house, and also in a 

 church. The stone is substantial and durable, but rather unsightly, 

 on account of some of the weathered, rusty, reddish-brown blocks, 

 due to iron stains. 



Gneiss rock is quarried south-east of White Plains ; and it can be 

 seen in the Methodist Episcopal church on the main street. It does 

 not show the same iron stains as the Hartsdale rock. 



Scarsdale, Westchester County. — Several openings, which 

 are known as the Seely quarries, are to the west of the road to Green- 

 ville and on the ridge, a half a mile west-north-west of the Scarsdale 

 railroad station. The main opening is at the south-east and near the 

 corner of the road. It is about 80 x 25 feet and 5 to 18 feet deep. 

 The rock is gneiss, thick-bedded and grayish in color. The strata 

 dip 72° north, 57° west. The smaller openings are west and north- 

 west of the main one, and between them the same massive bed of 

 rock is exposed and having the same dip of its strata. The principal 

 minerals of the rock are quartz, feldspar and a little black mica, and 

 these minerals in parallel lines and layers give the gneiss a foliated 

 structure. The exposed ledges near the quarry show very little 

 alteration due to weathering ; and are firm and solid, indicating a 

 strong and durable stone. Blocks of large size, up to 40 feet in 

 length and 15 feel wide, have been taken out. The plant consists 

 of one engine, one derrick and two steam drills. There is no water. 

 Stone from this quarry has been used for bridge work for the Bronx 

 River aqueduct, and also for the Williamsbridge Reservoir gate- 

 house. The stone seems specially adapted for heavy work. The 

 quarry is worked at intervals according to the demand, and the stone 

 carted by team to the railroad station. 



