4S NEW YORK STATE MUSEUM 



Graphite lias a basal cleavage, splitting into plates which are 

 flexible and slightly sectile, its luster is metallic and its color 

 black to gray. 



Graphite occurs in beds and as embedded grains in granite, 

 gneiss, mica schist and crystalline limestone. It is quite widely 

 distributed throughout New York, appearing notably at Hague 

 from which locality a large proportion of the American output 

 is obtained. 



Graphite is used largely in the manufacture of crucibles and 

 other refractory vessels, in the so called " lead " pencils and for 

 many other purposes. 



Sulfur S «, 



Sulfur is found in orthorhombic pyramids as in fig. 157, or 

 modifications of the same, fig. 158, the crystals are often trans- 

 parent and in the Sicilian variety extremely beautiful. Sulfur 

 is also found massive, reniform, stalactitic, incrusting other 



Fig. 157 Fisr. 158 



Sulfur 



minerals, as in the varieties found near hot springs and in 

 the form of a powder. The color is commonly a lemon-yellow 

 but not infrequently shades into yellow orange, brown or gray. 

 The luster is resinous and the streak white. Sulfur is found 

 notably in the regions of active or extinct volcanic action, as a 

 deposit from hot springs and as a product of the decomposition 

 of sulfids and sulfates. It occurs in large deposits in the 

 island of Sicily; it is also distributed to some extent throughout 

 the western part of the United States and has been known to 

 occur sparingly near the sulfur springs of New York. 



Sulfur is used in large quantities in the manufacture of sul- 

 furic acid, gunpowder, matches etc. 



