t ill 1 



.equally approved in Germany; nor, indeed, 

 has it been unknown to the learned in England; 

 for the ingenious and celebrated Dr. Lewis 

 lias mentioned it with praiie in the fecond part 

 of his Philcfophical Commerce of Aits lately 

 published. % 



As a foreigner I fliould make an excufe 

 for the tranflation, it not being fo elegant as it 

 ought to be ; however, I flatter myielf I fhall 

 not be too feverelv cenured on that account, 

 fince it is a known truth, that originals always 

 .lofe fomething of their beauty by being tran- 

 •flated : I therefore think it better to prefer the 

 true meaning of authors to the elegancy of 

 ftile, particularly in fcientifical works ; and I 

 am in this refpedt more able to give the Public 

 fatisfadiion, as I have had the happinefs to be 

 a difciple of the author himfelf. 



That the mineralcgical terms might be more 

 •generally understood, 1 have added the Swedifli 

 and German names of the mineral bodies to 

 their Englifh and Latin names ; except when 

 to avoid tautology I have fometimes left out the 

 •German as nowife different from the Swedifh 

 names. New difcoveries being daily made in 

 thi- fcience, I have alfo added fome notes of 

 my own, concerning fuch things of which I 

 am perfeft'y convinced, leaving feveral others 

 to be further examined and tried. 



I was in hopes to have {ten a fecond edi- 

 tion of this excellent work improved and aug- 

 mented by the author himfelf; he having, 



a z ever 



