MlNSRALOGt. 
another future benefit from it, viz. that of con- 
cluding, from many obfervations^ if all the Saxa 
are to be equally confidered; for example, if iri 
fome of them veins or ftrata of ores may be expeid;- 
ed, and if thofe are only of certain kind's y if others 
are every where found deftitutc of any ore whatfo- 
ever ; if, and which of them are fit to form coats 
on the furface of the rock, v/hich covers other 
kind of ftones, and alfo veins and ftrata of ores, 
&c. If.no general rules are to be deduced front 
fuch obfervadons, there is a probability, at leaft, to 
gain fome inlights that may be particular to certain 
countries ; and this opinion is already in fome 
places confirmed by experience. Hence it may- 
be concluded, how neceffary it is to communicate 
all fuch obfervations v/hich, for the above-men-^ 
tioned purpofes, ought to be made over the whole 
globe, and to agree on fixing certain names on the 
Saxa^ in order to avoid too great a prolixity in theif 
defcriptions. It is with this intention I have here, 
as a trial, given fpecific names to thofe Saxa which 
are found in this northern country, and which Saxa 
I know; wifhing at the fame time to be acquaint- 
ed with a method to diftinguifh them more eafily 
and to better purpofe. 
This procedure v/ill be found flill more necefTary 
and ufeful, as the world fee ms refolved foon to 
abolifh the fuperftition of the Hazel Rod or Vir- 
gula Divinalorid^ and that we have by means of 
obfervations already got too much experience to 
believe, that the ilrata of earths and Hones are 
placed equally and in the fame order and fitnation 
over the whole earth; v/hich fome, however, in 
thefe our times have even endeavoured to prove^ 
while others have made a fecret of it, in order by 
fome v;ay or other to enrich themiclves, 
S ^ 
S E C T. 
