OBSERVATION S. 21 
As a kind of Wood-tin, I am inclined to 
confider another ftill more rare fpecies, 
called Shot-tin, which is brought from 
Maddern. This is only found in fmall 
feparate hemifpheres of the lize of a 
divided fhot. The furface is fmooth, 
and brown, but theinlide, or the nucleus, 
is of a light-brown, and of white yellow 
colour, and llightly radiated. Thefe 
ftaladtitical hemifpheres, which, as one 
may fee, have been fixed to other bodies, 
are fimilar to the fmall fpherical protube¬ 
rances of Wood-tin, excepting that the 
latter are not fo hemifpherical, but flatter. 
Sulphurated tin-ore from Cornwall. 
At Huel Rock in Saint Agnes, there has 
been found a metallic vein, nine feet wide, 
and twenty yards beneath the furface. 
The conftituent parts of this ore, although 
experiments had been made upon it, were 
ftill unknown. Mr. Rafpe, who now 
lives in Cornwall, is the firft who difco- 
C 3 vered 
