REPORT OF THE DIRECTOR AND STATE GEOLOGIST 1900 rl7l 



slabs. In closely bedded parts channelers make cuts 12 feet 

 deep and 2 inches wide, on the dip. These cuts are put in about 

 42 inches apart. Gadders or drills mounted on quarry bars are 

 then used to put in rows of horizontal holes at right angles to 

 the strike. Wedges in these holes release the stone in slabs 

 of the desired size. Powerful derricks then lift the blocks to 

 the level of the mill. After dressing it is sent down a side track 

 to the Harlem railroad above Tuckahoe. Ko explosives are 

 used. 



TitcJcalioe marUe compam/s quarry. This (52) is next south of 

 the above, is idle now, and has not been worked for five years or 

 more. 



Xew York quarry co. This quarry (51) is the southernmost of 

 the Tuckahoe quarries and was formerly known as the Master- 

 ton quarry. One of its two openings is idle, the other and 

 larger is worked under lease by O'Connell & Hillery, the stone 

 being crushed for " marble dust " or burned into lime. The 

 rock is blasted, hammer-broken into pieces of convenient size 

 and carried by cableway to the kilns. 



Analyses of the stone from the O'Connell and Hillery quarry 

 follow. Several of these have been erroneously quoted in dif- 

 ferent state and federal publications, the analysts' names being 

 given incorrectly and the analyses being referred to the Nor- 

 cross quarry. 





1 



2 



3 



4- 



Si Oo 





2.4 

 1 2.15 

 83.36 



""i2!69 



70.1 

 ""25!4" 



.24 



AhOo 





.19 



Fe? Oq 



.21 



.21 



Ca CO3 .- . 





CaO 



30.68 



30.16 



MgCOs 





Mff 



20.71 



46.66 



1.33 



21 25 



CO2 



47.3 



Insoluble 









1 W. F. Hillebrand, analyst, 1887. 



2 H. L. Bowker, analy8tri894. 



3 17th an. rep't U. S. geol. sur. nt 3, p. 796. 



4 P. de P. Ricketts, analyst, 1887. 



