OF PART THE SECOND. xxiii 
and from what he has since seen oi foreign mines, 
he is convinced that a proper attention has not 
yet been paid to the importance of our own 
mountains. 
In the account of antient copper coinage, as of 
all other cupreous antiquities, the author has 
always used the word bronze — a term now 
become absolutely necessary — to distinguish the 
old chemical compound of copper and tin, from 
that of a later age, consisting oi copper and zinc, or 
orichalcunf, which is called brass. Thus, at the end 
of the Seventh Chapter oi \h\s Volume, he mentions 
''Roman, or ecclesiastical brass coins." There 
was no such substance known in the Heroic asres^ 
nor in the time of the Fehponnesian ivar, when 
copper began to be used for coinage in Greece, as 
that compound which we call brass : and per- 
haps there is no better test to decide at once the 
distinction between a genuine antique bronze, 
and those spurious imitations of the works of 
the Antients, of which there exists a complete 
manufacture at Naples, than to submit the su- 
spected metal to any chemical test which may 
(2) " Cudmia'terra qute in tes conjicitur, ut fiat ORicHALCtM." 
Fe$t, de Ver, Seq. 
