No. i 



No. 2 



63.II 



65.65 



l8.02 



16.84 



2.12 





3-53 



4.OI 



1-43 



.13 



2.56 



2.47 



4.08 



5.27 



4-26 



5-04 



.26 



[ -30 



.09 



QUARRY MATERIALS OF NEW YORK 89 



Adirondack Railroad (R. W. Jones, analyst). No. 2 is quoted from 

 Smyth's paper: 



SiOa 



M203 



Fe 2 3 



FeO 



MgO 



CaO 



Na 2 



K 2 



H 2 0+ 



H 2 0? 



99.46 99.71 



Sulphur is not shown, though present in small amount. 



Physical tests. . A sample of the syenite from milestone 55 

 Carthage & Adirondack Railroad, was tested in the laboratories 

 of the State Department of Highways : Specific gravity, 2.705 ; 

 weight, pounds a cubic foot, 169; absorption, pounds a cubic foot, 

 .07; hardness, 18.1, toughness, 15. Tests by the writer showed 

 ratio of absorption .148 per cent, pore space .402 per cent. 



PARISHVILLE RED GRANITE 



A monumental and structural granite has been quarried at Parish- 

 ville in eastern St Lawrence county. It has a dark red fine-grained 

 body in which appear curved and branching veinlets of bright red 

 colors and somewhat coarser grain, but of the same mineral compo- 

 sitions as the rest. The veining is not sharply defined but shades 

 off on the borders and in places develops into round or irregular 

 nuclear patches which give the effect of clouds of lighter color. 

 The appearance of polished surfaces is attractive as it is quite rare 

 among stones of this class. The variation in grain is not the result 

 of pegmatitic injection, but of different conditions of crystallization 

 during a period of resoftening of the rock. The granite belongs to 

 the Adirondacks granite gneisses and is composed of feldspar, 

 biotite and quartz, the last in rather small amount, with some horn- 

 blende, magnetite and zircon and a little chlorite. 



Crushing tests on the granite made at the Clarkson School of 

 Technology at Potsdam showed an ultimate resistance of 20,000 



