[ 478 J 
SECT. VI. 
This way of Undying Mineralogy has al- 
ready fome time ago been entered upon ; buti 
Mr. Pott, at Berlin, has brought it to a greater 
perfedion •, and after him Mr. Cronftedt, in Swe- 
den, has extended it yet farther, fubmitting every 
mineral body, that came to his hands, to chemical 
experiments •, in confequence of which he after- 
wards pub.liHied his E£ay towards a Syjiem of 
Mineralogy. 
SECT. VII. 
Thus the greatefi: obftacle is removed ; the beft 
method to learn Mineralogy is laid open, in foE 
lowing which we are enabled to render this Science 
more and more perfedt. To obtain this end, che- 
mical experiments are without doubt neceflary $ 
but as a great deal of the mineral kingdom has 
already been examined in this manner, we do net 
want to repeat all thofe experiments in their whole 
extent, unlels fome new and particular phoeno- 
mena lliould difcover therhfelves in thofe things 
we are examining ; elfe the tedioufnefs of thofe 
precedes might difco-urage fome from going far- 
ther, and take up much of the time of others, 
that might be better employed. An eafier way 
may therefore be made ufe of, which even for the 
mod: part is fufficient,. an.d which though made in 
miniature, yet is as fcientifical as the common 
manner of proceeding in the laboratories, fince it 
imitates that, and is founded upon the fame prin- 
ciples. This confifls in a method of making er^perE 
ments upon a piece of charcoal with the concentrated 
fane of a candle blown through a Blew -pipe.. The 
heat 
