326 On the Coal Formations in the State of New Yorh. 



while that which goes to Alhany, and farther nortli and west, is car^ 

 ried to Hudson. 



Besides the great bed of Brown Iron stone at Ore hill, there are 

 numerous other deposits of the same ore in Sahsbury and the neigh- 

 boring town. One of them, called Davis' bed, occurs two and a 

 half miles north-east of the ore hill ; from which there was formerly 

 a considerable quantity of ore taken for forges and furnaces : but, it 

 is at present neglected. Two or three others are found in the north 

 part of the town, and north-west of Chaptn, Sterling &. Co.'s fur- 

 nace ; they make iron of an inferior quality, however, and are not 

 much used at present, though it is understood, that they are capable 

 of furnishing considerable quantities of ore, if it shall, from the ex- 

 haustion of ore hill, ever come to be wanted. The towns of Ame- 

 nia and Beekman, in the State of New York, furnish ore to three 

 furnaces in Kent, which make excellent iron. There is an abun- 

 dance of ore in Kent also, which furnishes three other furnaces in 

 that place, two of which are upon the Housatonic, and the other 

 upon a branch of it ; but the iron they produce is less tough and 

 malleable than that of Salisbury. 



Art. X. — Remarks on Professor Eaton'' s " Observations on the coal 

 formations in the State ofJYeiv York f by David Thomas, Civil 

 Engineer, Corresponding Member of the Linnsean Society of Pa- 

 ris, Stc. 



No person has so minutely examined as large a portion of the 

 United States with reference to its Geology, as Prof. Eaton ; and 

 his sagacity has equalled his industry and zeal. Probably none of 

 his writings is more interesting and important, than the article now 

 before me, although some of the observations might be advantageous- 

 ly extended, explained, and perhaps corrected. 



" Mr. C. Van Rensselaer and myself have traced the slate rock 

 which embraces the bituminous coal of Tioga to Seneca and Cayuga 

 lakes, also down those lakes to their oudets." I have not noticed 

 this sentence on account of an error in the last clause, for Prof. E. 

 will recollect that limestone occurs on the shore of the Cayuga for 

 nearly nine miles above its outlet ; but I wish to ask whether he con- 

 siders the slate which appears on the sliores of our lakes as the same 



