NATURAL HISTORY. 
parently of cones belonging to the pine family, are 
occassionally met with; we have also been favored 
by Mr. Croker with specimens, in a very perfect 
state, of a small one-celled capsule, or drupe, re- 
sembling that of the genus, Myrica, 
We shall conclude with a general view of the 
commercial and ceconomical importance of the avail. 
able mineral products of each formation, 
The Granire.—7Tin has always been considered 
the most ancient and valuable product of this rock, 
traces of old stream works &c., for obtaining this 
metal are every where to be met with, and tin peb- 
bles are by no means of unfrequent occurrence in 
these, but at present, none is produced as an arti- 
cle of commerce within our prescribed limits; tho’ 
there can be little doubt that if judiciously explored, 
many available lodes might be found. Micaceous 
Iron ore occurs in small lodes, and is worked in the 
parishes of Hennock, Lustleigh, Moreton and Bovey 
Tracey, under the name of shining ore. It contains 
a large proportion of carbon, and in fact may be 
considered as an inferior kind of Graphite or Pulm- 
bago, and is applied to many of the same uses—after 
being carefully washed, it is packed in casks in a 
pulverized state, and shipped in limited quantities 
