£799-] 
eeed to caft your bark and make a new 
Jeak ; work the leaks as far as about the 
fecond beft, when, inftead of working 
them thropgh, fill up the firft and fecond 
beft with the ooze from one of the -vats 
numbered above 24, which contains the 
ooze that you wifh to renew. After they 
have ftood about half a day, or a day, 
draw your ooze into the empty vat, con- 
tinue to work through the three beft leaks 
as many of the ftrong oozes, numbered 
above 24, as you think proper; after 
which work through the whole 24 vats 
and leaks, in the order in which they are 
numbered ; and it will be obferved that the 
wortt leak will become ‘the ‘beft, and muft 
‘be the higheft number, and that which be- 
fore was the worft but one will become 
your worft ; ‘but the vats fhould never be 
changed, as inthe courfe of working them, 
as foon as one is empty, it mutt be filled 
up again from that leak that it was worked 
upon ; by doing this the labour of fhift- 
ing the goods from one vat to another 
every time you make a leak is rendered 
unnecetiary ; alfo obferve the quantity of 
ooze that will be required-to make up 
your ‘leaks after the ftrong oozes are 
drawn, will be abundantly fufficient to 
empty ane of your vats; but your vats 
muft be fufficiently large to take the whole 
of the liquor from one of your leaks, fo 
that in the coyrfe of working the leaks 
and vats the oozes in each leak and vat 
will never be mixed together. The hides 
and fkins ywhen put into the vats may 
either be thrown’ in and handled in the 
ufual manner, or be fufpended upon fticks, 
which fticks may again be fafpended upon 
# wooden frame adapted to the infide of 
the vat, fo that it may readily move up 
and down in the vat, and which frame 
fhould be fufpended by a rope fixed at each 
corner of it, which fhould be in length 
nearly equal to the depth of the vat, in 
each of which ropes a noofe fhould be made 
about 2 inches from the top of the frame ; 
fo that a ftrong {tick, ‘by being put through 
the noofe at cach end, by being laid upon 
the fide of the vat, will fupport the hides 
and fkins ; or {mall hooks tinned, or made 
of bra{s or copper, may be-uled to fufsend 
the hides or {kins fixed into the fticks or 
frames ; or they may be tied or fewed with 
firings one or more together, or fepa- 
rately. To thift them trom one vat to 
another, a crane or machine for raifing 
great weights may be ufed, fixed in a 
{quae fraine, and made moveable upon 
four wheel< )laced at each corner at the 
‘bottom of the frame, fo that each wheel 
fhall and 4 or 6 inches from the point of 
fdr. Brewin’s Patent for Tanning. 
in the -ufual way. 
639 
the four corners of the vats, and the frame 
fo made that it fhall not in any part cover 
the vats it may ftand over, foas to prevent 
the higheft part of the goods being drawn 
up as high above the top of the vat as. the 
vat is in depth ; the ropes upon the frame — 
which {upports the hides, are to be fixed 
upon a roller, and by means of a pulley at- 
tached to the frame of the machine, the 
ropes will work in a perpendicular direc- 
tion ; the power of the machine thould be 
fuch that two men’ may readily work up 
the whdle of the goods in-the-vats, to fuch 
a height as that nearly the whole of each 
hide will become higher than the top of the 
vat ; the machine and goods may then be 
moved together, either ‘by a capftain or 
otherwife, and placed over that vat that 
you intend the goods tobe put into, and 
the goods may, ‘by the means of the ma- 
chine, ‘be lowered down into the vat ; the 
machine may al(o be ufed for the drawing 
up the ‘hides, and ‘letting them down again 
in the fame place, which will generally be 
found to anfwer the purpoies of handling 
A variety of machines 
may be ufed for the purpofe, but none I 
conceive fo advantageous as this now de- 
fcribed. In general the greeneft goods 
fhould ‘be in the loweft numbered vats, 
and the goods in the-vats nurnbered under 
24 fhould be fhifted forward every, time 
a green pack is taken into the yard, in the 
fame manner as goods in the floaters are 
in general, and the moft ‘forward pack put 
into fuch of the vats above 24. as may ap- 
pear moft convenient ; the goods, when 
taken into the yard totan, fhould be in 
the ufual ftate. dt is not neceflary that 
the goods fhould be taken out of the vats 
every time the ooze is pumped out, nor 
is it abfolutely neceffary that every part of 
the goods fhould go through the whole 
12 yats under number 24, but it will in ge- 
neral be proper that they fhould do fo, exe 
cepting dreffing leather, which will be of a 
brighter colour if at firft put into one of 
the forwarder vats, and not fuffered to be 
put into the three worft oozes at all. 
The advantages gained by this method of 
tanning, above any other method hitherto 
practifed, are principally thefe: Firft, 
that muchJabour will be faved: fecondly, 
that the oozes ufed with the forward 
goods may be obtained of any degree of 
ftrencth that may be required, and at the 
fame time the bark will be perfectly {pent 
before it is caft to the tan-hill, by reafon 
that all the oozes, before they become 
the beft oozes, are made to run through 
the whole of the leaks, but more particu- 
larly by being made to run through the 
: aNa yats 
” 
