5c/*w^ 



OBSERVATIONS UPON THE CADMIA, &C. 289 



Observations upon the Cadmia found at the Jlncram 

 iron works in Columbia County, J\'eiv York, er- 

 roneously supposed to be a new mineral. 

 By Wm. H. Keating. Head Sept. 10th ? 1822. 



In the second number of the first volume of the 

 New York Medical and Physical Journal, Dr. Tor- 

 rey has published a description and analysis of a sub- 

 stance, which he considered as a new mineral and for 

 which he proposed the name of green oxide of zinc: 

 a specimen of this substance having been handed 

 to me last spring, I immediately recognised it to 

 be similar in its nature and appearance, to a product 

 of the iron furnaces of Belgium, which has been 

 described by Mr. Bouesnel in the "Journal des 

 Mines," (Vol. 29. p. 35,) under the name of cad- 

 mia. Having had an opportunity of collecting on 

 the spot* the most satisfactory proofs in support 

 of my opinion, 1 beg leave to offer to the Acade- 

 my, the following account of this substance : It 

 was first noticed at Ancram in the year 1812, 

 when it was found in pulling down a stone wall 

 connected with the iron furnace, which belongs to 

 general Livingston, and is now under the direction 

 of Walter Patterson, Esq. It excited some interest 

 among the mineralogists of New York, but no public 

 notice of it was taken uutil lately. Mr. Bouesnel's 



* These observations were made during a short visit to An- 

 cram, in company with Mr. Vanuxem, who likewise, at the first 

 inspection, recognized this substance to be cadmia. 



36 



