grates, and brought back to C. If the ore is not Aoveiled
forward from C into a Hoping chanel ofr umber^E}! called
the Pafs, from whence it Aides by its own,weight, andttfatfaliitt-
ance of a final! rill of water, D, &to A e bdc at Y ; there! by the
lifters,, a, K cy faffing"©ft it after- tó n g laifefo <h
which is tumedmund by the water-wheel, B, ft is|foundefo orftamped
finall: to make the lifters more lafting, and fall upon the orc_with
the greater force, they are armed at the bottom, with large malles ot
iron o f one hundred and forty pounds weight teach, Called Stamp-
heads; and to affift the attrition, the rill of water, fl^ keëps the
ore perpetually wet, and the ftamp-heads cool, till the ore in the
box, Y , is pulverized, and finall enough to pafs through the holes
o f an iron grate at Y. The grate is a thin plate- o f kon; no more
than the tenth of an inch thick, one foot iquare, full ot imali
holes punched in it about the bignefs of a moderate pin, not always
of the feme diameter, but as the different fize of the tin granules
requires; for the larger the cryftals inclofing the metals are, the
larger muff be the holes, and vice verfdy< fo that in fuiting the grate
to the nature of the tin, the fkill o f the dreffer appears. Froöi
this grate the tin is carried by^a finall gutter* ^ =int© ^te forepit;
F, where it makes its firft and pureft fettlement, the lighter parts
running forwards with the water through holes méde in the parti-:
tion, ƒ , into the middle pit, G, (much of the feme ifrspe' sind fizq
as the forepit) and thence into the third pic, H ; mhat fettles, am
G and H is called the Jlimes, and whafe runs; off from them is
good for nothing. The forepit, F,. as foon as foil is emptied, and
Budding, the contents carried to the buddle, I, a pit feven feet long; three
wide, and two deep: the dreffer, ftanding in the buddle at I,
fpreads the pulverized ore at K , called the head of the buddle, in
finall ridges parallel to the run of the water which enters the bud-;
die at L, aud falling equably over the crofs-bar, M, wafhes the
flime from the ridges (which are moved to and fro with a Aovel)
till the water permeating every part, wafhes down the whole into
the buddle, I : whilft the dreffer’s hands are employed in ftirrmg
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 wafh and cleanfe
it from its impurities; the buddle fills, and the tin is forted into
three divifions; that next the head, at g , is the pureft; the middle,
at h, is next in degree ; that at i moft impure of the three; and
each of thefe divifions goes through a different procefs: the forepart,
at G, is taken out firft, and carried to a large tub, N, called
the Keeve; there immerfed in water, it is moved round with -a
Aovel for a quarter of an hour, by which means the impurities n e
from the ore, and become fufoended in the water; the tin-ore is
then
'then lifted ip *a fievte purpofely ëcloftrücaed, and if it needs} inuft be
feöt to be huddled again, then returned to the ktefeve arid Worked as
' before with a A o i^ v A ie h c a lb r ó ^ . ;the tin : the keteve is
then jmkeê, that is, beat with a hammer or mallet on the fides,
'that Aeforte withfo may fhift andftiake off tho waft, aöd fettle-Ae
^urer forthe botfoi§; »The föül'^tStef theftjbS* AéfopPë® the ketevp
is pourtei'öff, a ö d ''fo é^ ^ j WKiehrifettles^Sfet’é’ Aè[ €ny is flammed
*>ff> and iWhat ifoihaihS is pute eSdtigh fo1 b # feit- fo foè metóu|jt
huufe, andc is -then Called BlaekMim; - ' The I waft flfimöied öff,’%
feSrefiiÜy laid by to undergo afiètbéf foalhirigi - A^ d f t wh^ffefopart
o f the buddfëj I, frb&üs manuÉÉhfiihg1 at 5the kievte, angthëf' hafid
is movfcg fortb'itlfet’pprf o f A fruddfe, #, •' in the fame - manher as $
Was before; and'is«lts*4urh te ;5 y 4 n # ffo # fd tff^ eh t'lt^ ¥ , W prot
iüöfed* to tie fcedve, and !AA'Whk^is- dëpbfiréd fo fo e 'lo i^ t , F,
ts É p Aai the
lïecëflhy lotions, i
r What runs off from F, -info G , aiid H, miiff be dèaltfoiA M gat Trucking
Other foantfer. • Thè-öèntcnts ó f ;&éfef pits. Êdnfift b f foë-]fmall; and
lighter parts , of A e ore, ahd-are iiitimatelyqhiked wiA a greater
quantity o f forth tófoftoüe ‘bniifed to-duft- feythe mill. ’ Thefe
are • called' &&■ fitnes-j and are carried by feme hoys (fooftly under
fc^rtë^(yèörs'wrg^ë),rïbyi2diPéSidh“ I
ïfunk O, whofe htfol'ff eaüëd:Ae; Pêdnah)r;lïs- a femicireular pit,
Whefefo a mö^esPA e Amy' tin -fotifol w iA a Ifttl’ë 1 ffrövel that
A e wafot -(which runs into P from Q, called A e Strakes) may wafh
SwayfiöA A e filth and tin- over a crofi ftick or böafo abÖütc teri: inches
deep : A e board is fomewhat lower- in A e middle than at eaefir ejfe|-
for adröitóng A e watry-mixture wiA' more cafe info A e body o f A e
trunk, G , R, R, which is a pit lined with 'boards ten feet long;
Artee Wide;1 and eight- inches dëèp; j A at which refts ïn A è forepart
O fth e t raA at O « , is carried é fffo be framed, and A e fettlement
at R R ,r is liiored forward tb F tórbè truhked^over again before ft
is fit: È ^ fM f r a » i è ^ frètthb1, T W,? dohfifts
timber; the body W, thé head T;: -The water falling in a gentle
manner from S upon-Ae head T , waAes the ore, which there offers
itfelf (as at Ae budd fe) ih - li ttle ridgès, downwards over a flope
piece o f timber, - U; called - Aö ïjippeï, info A e body5 o f A e fraifie
W. Upon this frame the waftef is^foad fo . Aih; Ind ruhs fo fföwly;
(the plane being nearly horiz&htal)'* that B^ movihg the flifn-y tin tó
and fro WiA a light hand} andi^pofing if cabtiduffy fo;Ae water
with a fefnicirculat5 rake, all A è ljè h iê r:i&: foe
tin, though ever fo final], remaihs oh the frame near A e head;
When the tin is -foufrd- fuffidötftly11 clëiÉf, • A é 'body '8f ^Aé'
which is fixed on two irón axes, called Melliersf bne at the head,
Ae
f