140 XEW YORK STATE MUSEUM 



K2O -81 not det. 



Na.-O 2-75 not det. 



Li.O ■ . tr. 



H.O— 18 



H.O-r 43 1-33 



PsOs 20 -04 



V.O. tr. .55 



CO2 -12 .10 



S 07 .14 



Total 1 00 • 02 99 • 1 5 99 • 23 



Fe Z2.S2 32.59 



Sp. Gr. 3 090 4- 138 



\\lien recast the above analyses yield the following percentages 

 which are approximate but unquestionably near the truth. No. 3, 

 however, can not be recast with so great an excess of FcoOo over 

 FeO. 



Ilmenite 



Magnetite 



P3'rrhotite 



Olivine 



Pyroxene 



Plagioclase 



Orthoclase 



Apatite 



Calcite 



Kaolin 



Water 



XiO.CoO 



Spinel 



Corundum 



VcOs 



P.Os 



In the quantitative system, no. i comes under class II Dosa- 

 lane. order 5, Germanare, rang 4, Docalcic, Hessase, subrang 3. 

 Persodic, Hessose ; no. 2 falls in class I\^ Dof emane. order 4, 

 Domitic, Adirondackare, suborder 3, Tilhemic, Champlainiore, rang 

 T, Permirlic Champlainiase, section i, Permiric Champlainiose. 

 These last names will suggest the large part that the Adirondack 

 titaniferous magnetites play in the nomenclature of the system. 



Ledge Hill mines. About 2 miles a little south of west from 

 the village of Westport an abrupt hill rises to a bight of 1140 feet. 

 On the northeastern side and a short distance below the summit t^vo 

 jiits have been opened upon masses of ore in the gabbro. The ore 



I 



2 



2.13 



29.42 



2.09 



22. 97 



.18 



■35 



16.93 ■ 





13-41 



22. 91 



56.70 



13.62 



4-45 ■ 





•34 • 





.20 



.20 



3.10 . 





.18 



1-33 



.02 







5-97 





.92 





•55 





•04 



