182 Intelligence and Miscellanies. 



contains a small quantity of lead, which varies from 2. 4 to 

 6. Oper 100. 0. 



The Chemical analysis of this substance made in New- 

 York, has rendered it unnecessary for me to undertake that 

 which I proposed making. I shall merely add a compara- 

 tive view of the results of the analyses, made upon the Eu- 

 pean and American. 



Bouesnel. Drappier. Berthier. Torrey. 



Oxide of Zinc 90. 1 94. 87. 93. 5 



Lead 6. 2. 4 4. 9 



Iron 1. 6 2. 6 3. 6 3. 5 



Carbon 1. .5 .6 1. 



SileXjearthsjSand, &;c. 1.8 3. 4 



100. 5 99. 5 99. 5 98. 



These analyses present a remarkable coincidence, except 

 in the presence of lead in the European, and its absence in 

 the American cadmia; but this difference is of no impor- 

 tance; in Belgium Mr. Bouesnel tells us that the iron ore 

 is visibly intermixed with lead ore, and this accounts for its 

 existence in the cadmia; we are also told that lead is found 

 there in the furnaces below the metallic iron. It is not dif- 

 ficult to account for the presence of zinc with the iron ore, 

 for in examining the ore bed at Salisbury, (14 miles east of 

 the furnace) we ascertained that the hematite was found in 

 the side of a hill, incumbent upon the shist and, as it were, 

 incased in the decomposed part of it, and that the adjoining 

 shist was very much broken up and altered ; it does not ap- 

 pear that the hematite is the result of infiltration alone, for 

 masses of micaceous iron ore are found connected with it, 

 which appear to indicate that it results in part, at least, from 

 the decomposition of oxidule or oligist iron ore. We know 

 that this shist contains blende or sulphuret of zinc, in some 

 places at least, as at the Ancram lead works, and this may 

 account for the presence of zinc. 



Mr. Bouesnel has endeavoured to explain the formation of 

 these cadmia, in a manner which does not appear to me to be 

 satisfactory, I would rather admit that it results from a reduc- . 

 tion of the oxide or carbonate of zinc, which is intermixed 

 in small quantities with the iron ore ; that this reduction 



