1801.] 
much in vogue. Shakefpeare’s works are 
alfo tranflated by Don Pepro MonTeEn- 
GON, who is at prefent publifhing a Tran- 
flation of Offian in Verfe: El Fingal, y el 
Lemora, T. 1 ing. for Efcribano. The 
Featro. Nuevo Efpanol, in three volumes, 
Gentains the belt pieces of MoLieRe, 
New Patents enrolled. 
243 
Desroucues, &c. and alfo of KoTze- 
BUE, who is here likewife feverely criti- 
cifed. There exift alfo Tranflations of 
Arnauld’s Delaffements, Saiut Pierre's 
Eiudes, and of Quintilianus ; and a fecond 
edition of Blair’s Leétures has been lately 
publithed. . 
NEW PATENTS LATELY ENROLLED. 
Ta 
FIR. JAMES MANLEY, of Great Budworth, 
in Chefbire, for a NEW METHOD of MA- 
NUFACTURING SALT. 
HE PaTeEnrTERs, in his fpecification, 
previous to the defcription of his 
f{everal improvements, gives a fhort ac- 
count of the method of manufaéturing 
falt from brine, which is actually employ- 
ed in Chefhire, ‘and probably has conti- 
nued the fame, without material alterations, 
for a long courfe of years. It appears 
that every kind of brine contains in folu- 
tion feveral foreign matters (befides the 
common falt, which is its largeft faline in- 
gredient),, which are all to be confidered as 
smpurities, and, by mixing with the fale, 
impair its goodnefs. Several of thefe im- 
purities are feparable by heating the brine 
to a moderate degree, and thele are the 
earths and theiron, which are held in folu- 
tion by the carbonic acid. The whole 
procefs of boiling dowa the brine is per- 
formed ufually in’a fingle iron-pan, of 
large dimenfions, but fhallow, and heated 
by furnaces beneath it. The confequence 
ofufing a fngle pan is, that the impurities 
above mentioned fall down to the bottom 
of the pan, and foul the brine as foon as it 
is heated, and therefore they require to be 
raked out before the falt begins to feparate 
by the continuance of the evaporation. 
This raking-out is reprefented as a trou- 
blefome procefs, and, moreover, very im- 
perfect, fince it is impoffible entirely to {e- 
parate the impurities by this method. __ 
The firft, and what appears to us the 
amoft material, of the three articles of ime 
provement which are included in the fpe- 
ification, is the addition ef another pan 
adjoining to the principal evaporating pan, 
and heated merely by an extenfion of the 
Aues from the furnaces beneath the latter, 
which additional pan the Patentee denomi- 
nates a Preparing pan.. This pan is to 
hold as much brine as. is generally ufed 
for one charge of the evaporating pan, 
and may be made of iron, or any other pro- 
per material. The dimenfions are not 
{pecified, and the exact form is left to the 
experience of the manufaGurer, It is the 
peculiar advantage of this preparing pan, 
that, whilft the common procefs is going 
on in the evaporating pan, the brine which 
is drawn frefh and cold into the preparing- 
pan) is heated without any additional ex- 
pence of fuel, to fuch a degree as to depa- 
fite the impurities feparable by heat, and 
to be made clear, hot, and partly boiled 
down, before it goes into the evaporating. 
pan. This laf, therefore, whilft it is fi- 
nithing during one day the procefs of falt- 
ing, is: preparing, by its furnaces, the 
brine in the preparing-pan to be ufed the 
next day, and ina ftate much fitter for giv- 
ing immediately a good falt, than if the 
brine were merely drawn up cold into a 
fingle evaporating pan, as in the ufual me- 
thod. 
The great faving in the ingenious and 
fimple means ‘employed by the Patentee 
is certainly that of fuel (which is entirely 
coal in the Chefhire-works), and the con-- 
fumption of which is fo enormous as to 
form a very large fhare of the expences of 
the manufa&iure. The preparing-pan thus 
brings the brine to the fame ftate for 
which, in the common procefs, afire af fe- 
veral hours is requifite, without any addi- 
tional expence of fuel, as it receives all 
its heat at fecond hand, from the flues of the 
fires of the evaporating-pan. 
Among the leffer (though not unimpor- 
tant) improvements mentioned by the Pa- 
tenteeare: Animprovement in the quality 
of the maruta&tured articles, which is ef- 
fected by caufing many of the impurities 
to fubfde in the preparing-pan (out of 
which they are daily. drained off througha 
wafte-pipe), inftead of mixing with the 
brine in the evaporating-pan, trom which 
they can only be imperfcétly removed by 
raking-out ;—a faving of the time and 
trouble of raking out; and, by fending a 
purer brine into the falting pan, leflening 
the frequency of a neceflary operation 
called pickizg, which is, to pick off from 
the bottom of the pan, from time to time, 
with an iron inftrument,.a thick fediment 
(a mixture of falt, felenite, and. carbonate 
of lime), -which gradually forms, and re- 
liz quires 
a —— ae ee 
