430 Geological Specimens from Tasmania. 
calamine. The interior is not much changed, and is spotted 
with small patches of a white, shining, metallic substance. 
This mineral is in colour a kind of slate or blue green, 
and when cut with a knife gives out an odour something 
like arsenic. : 
No. 19, Volcanic Rock, in which the pine tree is im- 
bedded. 
I think this specimen is zinc and copper, imbedded in 
dove-coloured mineral. 
No. 20, Rock cropping out near the summit of a hill at 
Macquarie Plains. 
The whole of this specimen is calamine. 
No. 21, Sandstone from a quarry near Hobart Town. 
Sandstone of this description is always found overlaying 
the coal formations, and I have no doubt coal will be found 
in the neighbourhood. It is also a good building stone. 
No. 22, Coal from Schouten Island, East Coast. 
This is anthracite coal. It is found at Flocton, near 
Barnsley, Yorkshire ; at Walsall, Staffordshire; also in 
Wales, Scotland, and Ireland. 
No. 28, From the banks of the River Derwent, near 
Hobart Town. 
This is the brown oxide of iron-stone; the largest piece 
is covered with impressions of vegetable matter, similar to 
the iron-stone which overlays our coal measures. 
No. 24, Nodule of Iron-stone, found in deep beds of 
gravel at New Norfolk. 
This is brown hematite,—iron ore. It is found in this 
country and Scotland in veins in sandstone ; also in Cum- 
berland, Cornwall, and the Shetland Isles. It affords good 
iron and steel for needles. 
This specimen assumes what is called stalactiticform. It 
