LIME. 
225 
succeeding years. It was observed that galena almost always occurred in veins of this spar; 
and as these veins were very abundant, they were frequently opened at considerable expense, 
when there was not the least appearance of ore to warrant the outlay. It will be unnecessary 
for me therefore to notice in detail all the localities of calcareous spar in this county, as it 
occurs in some form or other at all the so called lead “ diggings.” 
The finest crystals have heretofore been found at the Rossie lead mine. Their forms are 
exceedingly various, and require particular descriptions. Crystals of a delicate straw-yellow 
colour, almost perfectly transparent, and from eight to ten inches in diameter, have occa¬ 
sionally been found in this vein ; while smaller ones, variously aggregated, have been obtained 
from it in vast quantities. They occur in the water-filled cavities of the mine, and are asso¬ 
ciated with crystallized galena, iron and copper pyrites, and rarely crystallized celestine. 
In addition to the primary form, which is common, we have here the primary with two of 
the solid angles replaced by tangent planes. Fig. 91, P on c 135° Ob These planes are 
Fig. 91. Fig. 92. Fig. 93. 
Fig. 95. 
Fig. 94. 
variously extended. Twins, as I suppose, of the above form, are also found. The face of 
composition is at right angles to the vertical axis, and the crystal has a triangular outline, 
Fig. 92. In other cases the face of composition projects, as in Fig. 93. Another twin, which 
is common here, is that 
which is represented in Fig. 
94. All these forms are va¬ 
riously modified. The dis¬ 
torted scalene dodecahedron, 
Fig. 95, credited to Rossie, 
is from Dana’s Mineralogy. 
It is proper to state, that 
the crystals from which se¬ 
veral of the above figures 
were drawn, were obligingly 
loaned to me by Dr. Em¬ 
mons, whose collection of minerals from this county is unrivalled for extent and beauty. 
Near De Long’s mill two miles from the Rossie mine, at the Jepson vein in Rossie, at the 
Wilson vein in Gouverneur, and at Mineral point on Black lake, specimens have been found 
similar to those already described, but they seldom exhibit such a variety of forms. 
Min. — Part II. 29 
