OBSERVATIONS. 13 
Stream-tin in blackilh rough grains is 
found at Perran Porth in Perranzabulo, 
where it lies fome yards under the fea- 
fand, and therefore can be collected only 
at the time of low-water. 
It is found at Hallibefack in Wendron, 
Frogmoor in Probus, at Saint Denis and 
Roach in larger and lefs rounded pieces, 
many of them dill (hewing their cryftal- 
lized angles. The fpecimens of dream- 
tin, from Swan-Pool in the pari(h of 
Ladock, are often mixed with pieces of 
cubic galena. 
The mod remarkable fpecies of dream- 
tin is a tin-ore like haematites, or what 
is called Wood-tin. This tin-ore is only 
found within a fmall circuit, in the three 
adjoining parifhes of Saint Columb, Roach 
and Saint Denis, and is very fcarce. The 
mod favourable opportunity of getting it 
is at the time when the workmen, who 
dream the tin, bring to the melting- 
houfes the quantity of ore they have col¬ 
lected during three or four months; 
amongft 
