Buddling. 
iy 8 natural history 
grates, and brought back to C. If the ore is not dimy, it is {ho- 
velled forward from C into a doping chanel of timber, E, c ^fed 
the Pa/s, from whence it Aides by its own weight, and the affijt- 
ance of a fmall rill of water, D, into the box at Y ; there by the 
lifters, a, b, c, falling on it after being raifed by the axel-tree, a, 
which is turned round by the water-wheel, B, it is pounded, or damped 
fmall : to make the lifters more lading, and fall upon the ore with 
the greater force, they are armed at the bottom with large maffes of 
iron of one hundred and forty pounds weight each, called Stamp- 
heads ; and to aldd the attrition, the rill of water, D, keeps the 
ore perpetually wet, and the damp-heads cool, till the ore in the 
box, Y, is pulverized, and fmall enough to pafs through the holes 
of an iron grate at Y. The grate is a thin plate of iron, no more 
than the tenth of an inch thick, one foot fquare, full of fmall 
holes punched in it about the bignefs of a moderate pin, not always 
of the fame diameter, but as the different fize of the tin granules 
requires ; for the larger the crydals inclodng the metals are, the 
larger mud be the holes, and vice verfa ; fo that in fuiting the grate 
to the nature of the tin, the {kill of the dreder appears. From 
this grate the tin is carried by a fmall gutter, e , into the forepit, 
F, where it makes its drd and pured fettlement, the lighter paits 
running forwards with the water through holes made in the parti- 
tion, f, into the middle pit, G, (much of the fame fhape and dze 
as the forepit) and thence into the third pit, H ; what fettles in 
G and H is called the Jlimes, and what runs off from them is 
crood for nothing. The forepit, F, as foon as full is emptied, and 
the contents carried to the buddle, I, a pit feven feet long, tiree 
wide, and two deep : the dreder, danding in the buddle at I, 
fpreads the pulverized ore at K, called the head of the buddle, in 
fmall ridges parallel to the run of the water which enters the bud- 
dle at L, aud falling equably over the crofs-bar, M, wadies the 
dime from the ridges (which are moved to and fro with a {hovel ) 
till the water permeating every part, wadies down the whole into 
the buddle, I : whild the dreder’s hands are employed in dirring 
the ridges at K, he keeps his foot going always, and moves the ore 
to and fro, fo as the water may have full power to wadi and cleanfe 
it from its impurities ; the buddle dlls, and the tin is forted into 
three dividons ; that next the head, at g , is the pured ; the middle, 
at h , is next in degree ; that at i mod impure of the three ; and 
each of thefe dividons goes through a different procefs : the fore- 
part, at G, is taken out drd, and carried to a large tub, N, called 
the Keeve ; there immerfed in water, it is moved round with a 
{hovel for a quarter of an hour, by which means the impurities rife 
from the ore, and become fufipended in the water ; the tin-ore is 
then 
