LIME AND CEMENT INDUSTRIES 777 



openings, which were originally opened as marble quarries, but 

 found unsuitable and subsequently worked for dimension stone 

 and flux, these operations continuing to the present. 



The limestone is a coarsely crystalline, fossiliferous rock, of 

 moderately pure and quite uniform character. The stone has to 

 be hauled 600 to 1000 feet to the railroad siding, thus permitting 

 easy shipment. 



The following analyses, no. 1 by T. Egleston and no. 2 by the 



chemist of the Burden iron works at Troy illustrate the character 



of the stone. 



1 2 



Lime , 



Lime carbonate , 



Carbon dioxid 41 . 191 



Magnesium carbonate 



Magnesia , 



Alumina 



Ferric oxid 



Silica 



Sulfur dioxid 



Phosphorus 



Water ., , 





91.7.. 



41.191 









3.51 



2.233 





.635 



1.01 



1.819 



.55 



1.842 



1.89 



.145 



.049 



.149 



.022 



.271 





99.685 



98.731 



While Mr Jones still owns some of the quarries, the majority 

 are said to be owned by Shute & Eightmyer (pi. 33). 



Dutchess county 1 

 The limestones in the eastern part of the county are a continu- 

 ation of those found in Westchester county and follow the line 

 of the Harlem river railroad, while those found in the central and 



1 Dwight, W. B. On the recent explorations in the Wappinger valley lime- 

 stones of Dutchess co., N. Y. {see Am. jour. sci. 1879. 17: 399) 



Recent investigations and palaeontological discoveries in the Wap- 



pinger limestone of Dutchess and neighboring counties, New York state, (see 

 Prnr*. Am. ass'n adv. sci. 81: HH4 ; also Am j>ur. sci. lftbl. 5i?: 2-l\)) 



Mather, W. W. Geol. 1st dist. N. Y. 1843. 



