20 
MINE It A L OGICAl 
diftinguilh them: is it like wife diftinguilh- 
cd by a fomewhat lefs internal glofs, and 
by the greater tendernefs of its fibres. 
With this excellent defcription of Mr. 
Werner may be compared the annexed 
drawings of the three principal fpecimens 
of my collection, which could be more 
eafily taken of this foffil than of many 
others, on account of the apparent orga- 
nical ftru&ure, and want of metallic 
fplendor. 
The cryftals of quartz, which interfed 
moft fpecimens of this ore, lead us to 
fufpeCt that the vein has been quartz j and 
this is rendered more probable by a piece 
I have, which has quartz upon both fides 
of it. 
* The above defcription, though tranflated with 
fidelity, may, perhaps, give the reader lefs fatifac- 
tion than he would expert from Mr. Klaproth’s cha¬ 
racter of it : this, in fome meafure, is owing to the 
want of an Englifli technical language correfpon- 
dent to the German one ; and, perhaps, in a greater 
meafure to Mr. Werner’s attempting to diftinguifh 
nicely degrees of qualities which do not admit of 
meafurement. 
As 
