344 Professor Haussmann on Metallurgic Crystallography, 
important subject have been but too generally neglected, in fa- 
vour of the conceits of the framers of systems ; professing to ar- 
range innumerable organized and living bodies, of which little 
more could be known than the mere figure and names, with- 
out regard to their comparative internal structure, the only so- 
lid basis of a true arrangement. 
Under a climate like that of North Britain, although temper- 
ed by an insular position, we have had already many difficulties 
to encounter ; but we have encountered, and, what is better, we 
have, in many respects, overcome them. Although placed be- 
yond the parallel of the olive and the vine, v/e have produced 
what is far superior to both,— -a perpetual verdure of country ; 
and this chiefly from the culture of plants gradually introduced 
from abroad ; and, after long experience, brought to grow 
luxuriantly. 
Art. XV.— On Metcdlurgic Crystallography. By Professor 
Haussmann. (Continued from p. 164.) 
3. Sulphuretted Metals. 
a. Sulphur ct of Copper. — I HE copper-stone (Lapis cuprinus)* 
belongs to that class of productions which most commonly occurs 
in founderies. It is produced either as an original formation 
from the first melting of ores of copper, or as a less original 
production from other metallurgical processes, and contains most- 
ly sulphuret of copper, with which are associated some other me- 
tallic sulphurets, particularly sulphuret of iron, and sometimes 
sulphuret of lead, besides simple metals, most frequently cop- 
per, and occasionally silver and gold. 
It is not improbable, that copper, in the same way as iron, 
admits of being conjoined with sulphur in many determinate 
proportions; but in copper-stone, the copper appears for the 
most part to contain the same proportion of sulphur as in native 
sulphuret of copper, to which it bears a very close external re- 
semblance. This opinion is confirmed by the fact that copper- 
* Lapis sulphureo-metallicus, IVaUerius . 
