426 Geological Specimens from Tasmania. 
Nos. 27, 28 and 29 embrace the Mountain Limestone, 
which form the great depositary of the lead, copper, and 
many other metals in this country, and every other country 
on the face of the earth. My reason for calling your atten- 
tion to the minerals and metals a second time is to point 
out to you their particular merits. They constitute the 
most useful and richest strata of the globe ; and believing 
you brought the specimens to this country more on account 
of their utility than for any other cause, I thought it right 
to be particular in pointing out the most useful, rather than 
the most curious. 
A. List of Fossils, Minerals, and Metals from Van Diemen’s 
Land, in Mr. Thomas Winsmore Wilson’s Museum ; 
received through the favour of Mr. Thomas Moore, of 
Bolton, in Lancashire :— 
No. 1, Pebbles found on the surface at New Norfolk. 
These pebbles have been detached from the primitive rocks, 
and abraded by the flux and reflux of the water, forming 
the shingle or gravel of the district. They consist of jasper, 
agates, carnelians, and quartz. 
No. 2, Fragments of Fossil Wood from Evandale,* near 
Macquarie Plains. . 
These are very interesting specimens, showing us the power- 
ful tendency of the absorbing properties of wood for mineral 
matter. These specimens are now principally silex, but will 
not scratch glass nor give fire with steel, and hence I shall 
denominate them opal. 
They are capable of receiving a high polish, and remind 
you of those striped agates and flints which are used for 
brooches and the lids of snuff-boxes. 
* Some locality between New Norfolk and Hamilton doubtless,— under 
& wrong name, 
