148 



Prof. Adams, in his report on the Geology of Vermont, (1846,) de- 

 scribes crystals of magnetic iron as occurring in granular specular iron. 

 In some cases they are partly, and in others wholly, converted into pe- 

 roxide of iron. They are found in Chittenden, adjoining Lake Cham- 

 plain. 



Several new localities of common magnetic iron have been discover- 

 ed since the publication of my Mineralogy, especially in the northern 

 parts of the State. I will only particularize its occurrence in beds in 

 the gneiss rock of Greig, Lewis county. It is supposed to exist in some 

 quantity, but it is associated with iron pyrites, and requires to be puri- 

 fied by the magnet. This is said to be the only known locality of mag- 

 netic iron ore on the western side of the great northern forest of New- 

 York. F. B. Hough, Sill. Jour., Jan., 1848. 



The sanguine anticipations which were at one time entertained in 

 regard to the conversion of the magnetic iron ore into steel by a direct 

 process, have not been realized. This is no matter of surprise to those 

 who had carefully studied the nature of steel and the peculiarities of 

 structure to which it owes its value. None but the most visionary per- 

 sons would have sanctioned expenditures based upon such erroneous 

 views. 



I may add here the composition of the cast and forged iron from the 

 ore of the Long mine, in Orange county. The cast iron contains carbon 

 2*390; silicium 1*904; phosphorus 0*027; sulphur 0*004; iron 

 95*603. 



The forged iron contains, silicic acid 0*532; phosphorus 0*023 ; 

 sulphur 0*001; iron, carbon and loss 94*443. The cast iron contains 

 traces of cobalt and nickel. Berzelius 1 Annual Report, 1847. 



IRON PYRITES. 

 (Mineralogy of New- York, page 287.) 

 To the interesting crystalline forms of this mineral, figured in my 

 Mineralogy, I may add that here introduced, which has been figured by 



Mr. Dana from a crystal from Rossie, St. Lawrence county, in the pos- 

 session of Dr. Emmons. Sill. Jour. a xlvi., p. 36. 



