38 Report on Building Stone of New York. 



of a low ridge and east of the Harlem railroad. They are in a line 

 from north-north-east to south-sonth-west, and between a quarter of a 

 mile and one mile from the Tuckahoe railroad station. The crystalline 

 limestone makes a narrow belt between the mica schists which bound 

 it on the west and on the east sides. And its beds appear to be con- 

 formable with the schistose strata. 



The north-eastern quarry is on land of the Stewart estate. The 

 quarry was partly filled with water when visited, and the outcropping 

 strata and upper part of the walls alone were then seen. The dip of 

 the beds is 70° N. 60° W. The stone is white to bluish- white, coarse - 

 crystalline, and contains some scattering, small scales of white mica. 

 On the joint faces tremolite crystals are common. This quarry has 

 been idle for twenty years, and the mill at the south side of the 

 quarry is in ruins. The marble in the Stewart mansion, Fifth avenue 

 and Thirty-fourth street, New York, was got here. 



About 100 rods south-west of Stewart's quarry is that of 



Youngs, which is 200 yards long on a line with the strike, and 100 

 feet wide, opposite the mill, and 30 feet wide at the south end and 

 40 feet deep. The beds dip 75° N. 55° to 60° W. The stone 

 is white, and rather coarser-crystal line than that of the Stewart 

 quarry. The association of the marble and the foliated, schistose 

 gneiss on the west side of the quarry is interesting, and the two 

 rocks are seen almost in contact and have the same regular dip to the 

 west-north-west. At the west side of the quarry there is a substan- 

 tial marble mill with six gangs of saws, and two large derricks stand 

 on the same side of the quarry. This quarry was idle the last year. 



The New York Quarry Company (J. M. Masterton) owns the next 

 quarry to the south. And it the largest of the Tuckahoe quarries. 

 When visited a part of it was filled to a depth of 60 feet with 

 water, and above it the sides were aboiit 60 feet high on the west 

 and 20 feet at the east. The rock here has a dip of 70° west- 

 north-west, and it is traversed by two systems of joints, of which 

 one crosses the quarry, dipping 80° north, and the other rolls to the 

 south-east, with an average dip of 30°. The stone is coarse-crystal- 

 line and pure white. On the east side of the quarry the mill, engine- 

 house and five derricks are placed. Two lime kilns at the south end, 

 burn the spalls and the stone not used for building, into lime. The 

 ridge'of mica schist at the west has its beds in conformity with the 

 beds of crystalline limestone \at the west border of the quarry. The 

 Tuckahoe quarries were first opened about 1820. ' And buildings 



