( v ) 
ADVERTISEMENT. 
T HE work of which a tranflation is 
now prefented to the public, was 
published about two months ago in the 
Schriften Natur-Forfchender Freunde, of 
Berlin. The Author of it is diftinguilhed 
in Germany for the extent and accuracy 
of his Chemical and Mineralogical know¬ 
ledge 5 and nothing more than his being 
known feems neceflary to procure him 
a fimilar diftindtion in other countries. 
The Tranflator confefles that one 
object of his undertaking has been to 
make Mr. Klaproth’s merit more ge¬ 
nerally known at the fame time he 
perfuades himfelf that his performance 
r 
