182 Intelligence and Miscellanies. 
contains a small quantity of lead, which varies from 2, 4 te 
6. 0 per 100. 0. 
The Chemical analysis of this substance made in New- 
York, has rendered it unnecessary for me to undertake that 
which L 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. 
4.0 87. 0 93. 5 
Oxide of Zine 90. 1 9 
—__——. Lead 6520 2. 4 4. 9 
———- lron eee ees 3.6 3. 5 
Carbon | $0 6 te 1. 0 
Silex, earths, sand, &c. 1. 8 | 224 
100.5» 99. 5 99. 5 98. 0 
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. “now 
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. oe 
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 
