LIME AI^D CEMEJ^T INDUSTEIES 777 



openings, wliich were originally opened as marble quarries, but 



« 



found unsuitable and subsequently worked for dimension stone 

 and flux, these operations continuing to tlie present. 



The limestone is a coarsely crystalline, fossiliferous rock, of 

 moderately pure and quite uniform character. The stone has to 

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

 easy shipment. 



The foUomng 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 51 .4 



Lime carbonate 91.7.. 



Carbon dioxid . 41 . 191 



Magnesium carbonate . 3.51 



Magnesia . 2 . 233 



Alumina 635 1 . 01 



Ferric oxid 1 . 819 . 55 



Silica 1.842 1.89 



Sulfur dioxid 145 .049 



Phosphorus 149 .022 



Water .271 ■ 



99.685 98.731 



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

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



Dutchess county^ 



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- 



j^inger limestone of Dutchess and neighboring counties, Xew York state, {see 

 Proo. Am. ass'n adv. sci. HI: 8W4; also .\rn jour. sci. 1884. 27: 249) 



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



