rl70 NEW YORK STATE MUSEUM 



The rock is, however, of great value for other purposes. In 

 its less crystalline condition (as shown at Tomkins Cove and 

 Stoneco) it is very important as a source of road metal. A 

 number of quarries are still working, but only one produces 

 building stone. The others crush the material, either selling 

 it as marble dust, for use in the manufacture of carbonated 

 waters and also in asphalt paving mixtures; or burning it into 

 lime, to be used for chemical or structural purposes. Wherever 

 a magnesia lime is serviceable, the product of these quarries 

 can be utilized. In early times lime was burnt at several points^ 

 between Yonkers and Lowerre, as well as north of Spuyten 

 Duyvil, several old kilns still being visible near the Hudson 

 river. 



Tuckahoe. Westchester co. Xorcross Bros, quarry. This, the north- 

 ernmost (53) of the principal quarries at Tuckahoe, was opened 

 in 1854. It was worked by A. Maxwell, then by A. T. Stewart, 

 and is noted in Smock's report as the Stewart quarry. It is 

 now operated by Xorcross Bros, under the superintendency of 

 Mr J. M. Masterton. The quarry is opened for a distance of 

 about 600 feet along the strike and is 150 feet wide and 70 deep. 

 No lime is burned and all the product is marketed as dressed 

 stone. During the entire time of its working, the maximum 

 annual production was about 60,000 or 70,000 cubic feet. Dur- 

 ing late years the principal buildings supplied were the Home 

 Life (rebuilding), the Clark mansion (80th st. and Kiverside 

 drive), and the New York Life — all in New York city. 



Three boilers are in service — one 100 horse power in the mill^ 

 and an 80 horse power and 50 horse power in the quarry. The 

 water is obtained from a spring in the quarry and requires no 

 treatment. An air compressor is used, which runs the drills 

 and the pneumatic tools in the mill. The compressor, drills, 

 quarry-bar and gadders are Ingersoll-Sergeant; the six chan- 

 nelers are Sullivan. In the mill are seven gangs of saws, four 

 planers, three turning lathes and three rubbing beds. 



The dip is steep, 70° or so to the west. In the more openly 

 bedded parts of the quarry wedges are used to separate the 



