348 Mineralogy of Jefferson and St. Lawrence Counties, JV. Y. 



abundantly in the town of Rossie, St. Lawrence Co. two or three 

 miles from Oxbow, on the road to Rossie furnace. It is found by 

 the road side, in granular lime rock, which, with the gneiss, crops out 

 very conspicuously for some distance. It is crystallized in prisms 

 from one to three inches in length, and from half an inch to one and 

 half inches in diameter. 



The town of Gouverneur, in St. Lawrence Co., furnishes many 

 minerals of still greater interest. The rock here is Granite, associ- 

 ated with Granular lime rock. The lime rock, in many places, is 

 sufficiently compact to be sawed into slabs, and take a good polish, and 

 some quarries are worked with advantage, and afford a handsome mar- 

 ble; but generally it disintegrates rapidly whenever it is exposed to the 

 air, breaking into rhomboidal fragments. One mile south from the 

 village of Gouverneur, on the road to Watertown, the Granite and 

 Lime rock crop out abundantly on both sides of the road. 



The granite here consists almost entirely of Feldspar. It contains 

 very little quartz, and not a particle of mica. On the west side of 

 the road there is a deep fissure in the granite, five feet wide and thirty 

 feet in length. On removing the soil and loose stones from this cavi- 

 ty, we found both sides completely studded with crystals of feld- 

 spar and green augite. The crystals of feldspar are flat prisms or 

 tables variously modified, and of different sizes. Many of the crys- 

 tals are weathered, and have lost their lustre, but the most perfect 

 specimens are those which have been protected by a covering of cal- 

 careous spar. These have fine polished faces, frequently six or seven 

 inches in width, of a greenish color, with considerable lustre. Good 

 specimens can be obtained only by considerable expense of time and 

 labor, it being necessary to blast the rock to the depth of six or eight 

 feet. The Augite is found with the feldspar in crystals one to four 

 inches in length, but destitute of lustre. 



Directly opposite, and about twenty rods from the road, the gra- 

 nite and crystalline lime rock are elevated in irregular ridges. 



Atone locality, where the marks of considerable labor appear, we 

 discovered scapolite, and phosphate of lime. A cavity eight feet 

 deep and ten feet in length, has been made by blasting the rock just 

 at the junction of the granite with the lime stone. The scapolite is 

 found in groups of short crystals, disseminated through the limestone 

 in great abundance. They are white, and generally translucent, with 

 highly polished faces. The most common form is a four sided prism, 

 with the edges replaced, and terminated by four sided pyramids at 

 one or both extremities. The crystals vary from one eighth of an 



