116 



[Senats 



CLASS III. 



COMBUSTIBLE MINERALS, NOT GASEOUS. 



SULPHUR. 



(Mineralogy of New- York, page 181.) 



Native sulphur is of common occurrence in the small cavities in the 

 encrinital limestone at the Cold Spring quarries, two miles east of 

 Lockport, Niagara county, Report on the Geol. 4dh Dist.y p 99. 



BITUMEN. 

 (Mineralogy of New- York, page 182.) 



Mr. Hall informs us that fluid bitumen is of common occurrence in 

 the Genesee slate, and with it a bright blue fluid and a substance like 

 spermaceti, but softer. These are volatile, and it has been impossible 

 to preserve any of them. The fluid bitumen and the blue fluid have 

 likewise been noticed in septaria, in the Marcellus slate. Rep. on the 

 Geology Ath Bist. p. 221. 



Mr. Hall has a cut of the Oil Spring in Freedom, Cattaraugus county. 

 He remarks that the origin of the spring is doubtless from the bitumin- 

 ous matter which is carried down by the water as it percolates through 

 the interstices of the sandstone. Rep. on the Geol. 4kth Dist. p. 310. 



GRAPHITE. 

 (Mineralogy of New-York, page 186.) 



Several localities of this useful mineral occur in Northern New- York, 

 which it is probable will yield an abundant supply. The Ticonderoga 

 deposits are already turned to considerable profit. In the village of 

 Keeseville, at a short distance from these deposits, there are three 

 manufactories of pencil points, which send out several millions annu- 

 ally. Large quantities of the mineral in powder are also consumed for 

 stove blacking, for which purpose it is considered by many equal to the 

 celebrated '* British Lustre." 



A new method has been recently proposed by Profs. R. E, and W. 

 B. Rogers, for determining the carbon in native and artificial Graphites. 

 For the details, the reader is referred to Silliman^s Journal^ May^ 1848; 

 vol 5, N. S., p. 352. 



