410 DESCRIPTIVE MINERALOGY. 



Lewis County. The brown variety, both granular and massive, with galena and calcareous 

 spar, is found in small quantities in veins in the Trenton limestone, near the village of Mar- 

 tinsburgh. 



Monroe County. Zinc blende, of a wax-yellow colour, both massive and crystallized, in 

 the form of the dodecahedron (Fig. 483), has been found in cavities in the limestone near 

 Rochester. It is sometimes associated with galena, but the mineral is not abundant, and 

 perfect crystals are exceedingly rare. 



Montgomery County. This mineral, in very minute light yellow translucent crystals, 



occurs, associated with galena, on Flat creek, two miles southeast of Spraker's basin in the 



town of Root. Among the forms are the dodecahedron (Fig. 483), and the regular octahe- 



Fig. 484. Fig. 48.5. dron. Fig. 484. g on m, or g' on m' 109° 



yr~ — N. 28' 16". 



X \^\ ^\ Niagara County. Crystals of zinc 



y \ \ /\ ^.^^v\^~^\ blende, having a fine honey and wax-yellow 



"■^- ^ (i p f\S / \ 7 colour, are found in tfic limestone at Lock- 



\^'\ i» / / \i / ^y/ ^ V V°^^- They are translucent and transparent; 



V^-''^^ ^\//^ have the form of the octahedron, the dode- 



^^i;^^^ /X^ cahedron (Fig. 483 and 484), and of that 



represented in Fig. 485 {Horton). 



Similar crystals are found on Goat island, near Niagara falls. They are in the form of the 



dodecahedron, but usually imperfect. They are sometimes flattened, and have some of the 



angles rounded. 



Oneida County. There are several localities of zinc blende in this county. Near Hamilton 

 College, it has been found in yellow and nearly transparent crystals. The yellow massive 

 variety is found near the villages of Rome and Vernon. 



Orange County. In the Highlands, zinc blende occurs black, opaque, nearly dull, and 

 resembling some varieties of hornblende. It is not abundant. 



St. Lawrence County. Since the opening of the lead mines in this county, zinc blende 

 has been found in various places, and in some instances in considerable quantity. At Cooper's 

 falls, it is met with in a vein of carbonate of lime. At Mineral point, the massive varigty is in a 

 vein accompanying galena, in a similar gangue. The blende at both these localities has a 

 brown colour and foliated structure. A specimen from Mineral point had the following com 

 position, viz : 



Sulphur 32.80 



Zinc, 59.40 



Iron, 6.30 



Gangue and loss, 1.50 



On the farm of Mr. Belmont in the town of Fowler, there is, according to Dr. Emmons, a 

 vein made up in about equal proportions of zinc blende, iron and copper pyrites. It is about 



