LEAD. 
413 
Geological Situation. This mineral is found in various formations, as the primary, the 
transition and the secondary. In this State, it is found in veins in granitic rock, in the Tren¬ 
ton and Lockport limestones, and in the coarse sandstones of the Shawangunk mountains. 
Uses. Galena is the ore which is almost exclusively employed in the reduction of the 
metal. 
LOCALITIES. 
In the preceding part of this work, I have given a full detail of all the information which 
was in my possession at the time of its publication, with respect to the localities of this ore, 
the condition of mining operations, etc. (see page 44). I shall here add only a few notices 
of the crystalline forms which have been observed, and a few facts in regard to the present 
situation of some of our lead mines. 
Lewis County. In the vicinity of Martinsburgh, several veins of galena have been found, 
traversing the Trenton limestone. It is usually associated with iron pyrites and the six-sided 
crystals of calcareous spar. The crystalline forms which have been observed here, are the 
cube (Fig. 488); the regular octahedron, Fig. 489; the octahedron with one solid angle 
replaced by a tangent plane, Fig. 490; and the same with all the solid angles replaced, as in 
Figs. 491 and 492. The crystals are usually small. 
Fig. 489. 
Fig. 490. 
Fig. 491. 
Fig. 492. 
Orange County. In the town of Deerpark, galena has re¬ 
cently been found in small quantities. According to Dr. 
Horton, it sometimes has the form of the cube (Fig. 488), and 
that of the compound crystal represented in Fig. 493. 
St. Lawrence County. The Rossie mines have yielded 
the finest crystals of galena which have heretofore been found 
in this State. Some of these are of very large size, and con¬ 
sist of groups variously arranged. They are associated with 
calcareous spar, iron and copper pyrites, celestine, etc. The 
most common forms are the cube (Fig. 488); and the cube 
