MINERALOGY. ±B9 



another future benefit from it, viz. that of con- 

 cluding, from many observations^ if all the Saxa 

 are to be equally considered; for example, if in 

 fome of them veins or ftrata of ores may be expect- 

 ed, and if thole are only of certain kinds ; if others 

 are every where found deflitute of any ore whatfb- 

 ever ; if, and which of them are fit to form coats' 

 on the furface of the rock, which covers other 

 kind of (tones, and alio veins and ftrata of ores, 

 &c. If no general rules are to be deduced from 

 fuch obfervations, 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 necefTary it is to communicate 

 all fuch observations which, 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 their 

 deicriptions. It is with this intention I have here, 

 as a trial, given (pecific names to thofe Saxa which, 

 are found in this northern country, and which Saxa 

 I know; wifhing at the Same time to be acquaint- 

 ed with a method to diitinguifh them more eaSily 

 and to better purpoSe. 



This procedure will be found (till more necefTary 

 and uSeful, as the world Seems reSolved Soon to 

 abolifh the fuperftition of the Hazel Rod or Vir* 

 gula Divinatoria^ and that we have by means of 

 observations already got too much experience to 

 believe, that the ftrata of earths and itones are 

 placed equally and in the Same order and Situation 

 ever rhe whole earth; which Some, however, in 

 I ie our times have even endeavoured to prove, 



.lie others have made a Secret of it, in order by 

 fame way or other to enrich themielves. 



S 2 SECT, 



