1 84 Intelligence and Miscellanies. 



of the first furnace erected, the substance must have pre-ex- 

 isted to any furnace known to have been erected there, 

 which we think is not the case. 



Bui, in addition to ali the above mentioned proofs, and 

 to those which might be drawn from the circumstance of its 

 being fouLid in the vicinity of a furnace, I have been able to 

 obtain the evidence of men to the fact of its having been 

 formed in it. Having been informed that ore from the same 

 bed was used at the works belonging to Messrs. Holley and 

 Coffing, near Salisbury, I repaired there with a hope of 

 finding the cadmia near that furnace also. After a short 

 search, I found it in its immediate vicinity, and was inform- 

 ed by Mr. Holley, that he had himself taken it out of his fur- 

 nace about twelve years ago, when they renewed the stack. 

 He was positive that it was the same ; that it had been 

 found about six feet below the orifice of the furnace, and 

 that if not occasionally removed, it would have eventually 

 choked it. I even understood him or his partner to say, 

 that this substance was even at present occasionally formed 

 in the furnace in pieces of almost one-eighth of an inch in 

 thickness. One of the reasons why it is still formed at Salis- 

 bury, and not at Ancram, is probably owing to the ore used 

 at Ancram, being picked and the other not. Mr. Patterson 

 thinks his ore is also better roasted. 



According to Mr. Heron de Villefosse, a similar substance 

 is formed in the copper and lead furnaces of Julius, Sophia, 

 and Ocker, near Goslar, in the Hartz. At Goslar, as well 

 as at Jemmapes in Belgium, this cadmia is considered as 

 the best material that could be used in the manufacture of 

 brass ; as it is purer than the roasted calamine, it is prefer- 

 red to it, as well as to all other zinciferous substances. It 

 had not. I believe, been used in Belgium before Mr. Bou- 

 esnel described it. Should it be found in any quantity at 

 our furnaces, it would no doubt be equally advantageous to 

 work it with copper for brass. 



This substance has not yet been observed in many places. 

 I believe the only spot where it has been noticed, in addi- 

 tion to the above mentioned, is at Verrieres, in France, 

 ■where 1 discovered it in the year 1819.* I am inclined to 



*As no account of the cadmin of Verrieres has as yet been published, I 

 shall here add the note which I made on the subject in my journal. " July 



