( 4 8i ) 
Of T I N. 
The next metallick Subftance found in Cornwall 
and from which thefe Iflands are fuppofed to take their 
Name, is Tin. It is never found but as an Oar^ 
whereas Gold is never found but as a Metal, at leaft 
its Oar is unknown, and all other Metals are found 
fometimes as a Metal, and fometimes as an Oar. 
Tin always ftioots into Cryftals which are of diffe- 
rent Magnitudes from two Ounces in a fingle Cryftal 
to fuch as efcape our Sight. Thefe Cryftals are for 
the moft Part interfperfed in Loads of other Subftances. 
Paper the fourth contains Tin Cryftals interfperfed 
in a Load of a Kind of Clay, in which is obfervable a 
conftderable Quantity of Red-oker. 
Paper the fifth contains a Stone of hard Iron-Stone, 
in which are exceeding fmall Cryftals of Tin. 
Paper the fixth contains fomewhat larger Cryftals, 
interfperfed in a dry Red-oker. 
Paper the feventh contains Tin Cryftals, interfperfed 
with Sparr-ftone and a Sort of Marl. 
Paper the eighth contains larger Cryftals, interfperfed 
in a Kind of Clay and Red-oker, as in Paper the fourth. 
When a hundred Sacks of the Load (each contain- 
ing more than a fVincheJier Bufhel) yield one Gallon 
of clean Oar, the Load is efteemed very well worth 
working. 
Sometimes thefe Cryftals are fo colleded into one 
Mafs, as to form Loads of pure Tin Oar, and fo large 
as to yield to the Value of ioo/. every twenty-four 
Hours. 
i 
Paper 
