THE MINING AND QUARRY INDUSTRY I906 



65 



In southeastern New York the quarries are worked mainly for 

 building stone which is supplied to New York city and other mar- 

 kets in the east. White and gray marbles are the characteristic pro- 

 ducts. Greenport, Columbia co., South Dover, Dutchess co., and 

 Ossining, Dobbs Ferry, White Plains, Oscawana, Pleasantville and 

 Tuckahoe, Westchester co., are some of the quarry localities. 



Production of marble 



VARIETY 



1904 



1905 



1906 



Building marble 



$278 994 



154 673 



45 104 



$571 810 



177 557 



25 190 



$337 365 

 99 100 



24 450 



Monumental 



Other kinds 





Total 



$478 771 



$774 557 



$460 915 





The production of marble reported by 13 producers amounted in 

 1906 to a value of $460,915, divided as follows: building marble, 

 rough and dressed, $337,365 ; monumental marble, rough and 

 dressed, $99,100; other kinds, $24,450. There was a large falling 

 oif in the production as compared with the preceding year when 

 the output was valued at $774,557. This was due principally to 

 the smaller demand for building stone in New York city. The value 

 of the marble quarried in southeastern New York aggregated $260,- 

 350 against $464,247 in 1905. St Lawrence county reported an out- 

 put valued at $136,835 against $265,722. 



The quarries at South Dover formerly worked by the Dover 

 Chemical & Quarry Co. have been taken over by the Exploitation 

 Co. of America, with a view to reopening them to supply building 

 stone. Development work was prosecuted during the past year 

 and it is intended to begin shipments during the current season. 

 Drill cores show that there is a large quantity of stone available, 

 similar to the marble quarried by the South Dover Marble Co. which 

 finds much favor as a building material. An analysis of the marble, 

 made by E. F. Briggs, has been furnished by the present company 

 and is here given. 



Lime (CaO) 31-36 



Magnesia (MgO) 19.41 



Carbon dioxid (COo) 45-83 



Insoluble 



3.40 



100.00 



