334 
Ing (that is, where hops are really 
nfed for the purpofe), fome of the eflen- 
tial oil is always loft, and becomes 
highly fenfible from the grateful fmell 
with which the fteam of the boilers is 
impregnated. The infufion of malt cer- 
tainly requires no particular apparatus 
for its preparation, but where the ex. 
pence of a boiler for fleam only is in- 
curred, it is good economy to apply 
it to. every purp in’ which heat is 
wanted. 
OMAS GRACE, of ST. GEORGES’, 
ANOVER-SQUARE, WHITE-LEAD- 
MAKER, for @ METHOD of MAKING 
ax ACID for CORRODING LEAD ; aud 
alfa @ NEW METHOD of MAKING 
WHITE-LEAD. 
Tue ufual way of making white-lead 
3s but little varied in this procefs. The 
acid required fer the purpofe, is known 
to be the acetous acid, or vinegar, in ~ 
one form cr other. It is ufually made 
for. this operation, by fermenting me- 
laffes and' water, and other common ma 
Retrofpedt of the Fine Arts. 
_ [May x, 
terials, well known to vinegar-makers. 
The. Patentee employs, inftead of mere 
water, that in which wheat has ‘fer- 
mented in the procefs of ftarch-making, 
and which is itfelf.a pretty ftrong acid, ° 
and called fours. The Pateatee adds 
toa gallon of this liquer, from half-a- 
pound to’a pound of melaffes, along 
with the refufe of raifins which ‘remains 
after making wine, and ferments. the 
whole into vinegar. 
water over which oil-of-turpentine has 
been diftilled, which contains a quan- 
tity of acid, and is generally thrown 
away. 
ER ie 
MR. WAITBY, of COLLUMPTON, DE- 
VON, and OTHERS, for a BARK= 
MILL of a NEW CONSTRUCTION, 
by which the BARK can be GROUND 
without DRYING, at all TimES of the 
YEAR, aud to any FINENESS. 
THis invention promifes great ad- 
vantage to tanners in the faving of Bark. 
We fhall give a defcription of it im a 
future number. 
MONTHLY RETROSPECT OF THE FINE’ ARTS. 
(The Loan of al! new Prints and Communications are requefted.) 
Fubers and his Wife; painted by Rubens and 
Snyders, and drawn and engraved by G. 
Summerfield, late Pupil to F. Bartoloxzi, 
R. A. from the Original Pifiure in the Pof- 
Sefficn of the Right Hon. the Earl of Aylef- 
ford, tawhom it is injeribed. 
HE origmal picture, painted by 
| two artifts of fuch talents in their 
different walks,is a fingular curiofity. 
Rubens looks like a labouring man bear- 
ing a fawn upon ‘His fhoulder, and a 
bafket of game upon his arm: his 
wife follows him with a basket of fruit 
upon her head. The figures and fruit 
are painted by Rubens; the fawn and 
game by Snyders. 
To transter from the canvas to the 
copper a work by two fuch painters, 
was a noble daring , and this’ artiff, 
who is, as we are Inicrmed, a very younge 
man, has performed it ina manner that 
does great credit to him. To give a 
perfect idea of the animals ef Snyders, 
or the Jightnefs and briiliancy of co- 
louring of Rubens, upon copper, is not 
pofible; but this print diiplays great 
talent, and appears to be dene with 
much care; the drawiag is correct, the 
firoke clear, and, confidered as a whole, 
it leads us to expect that Mr. Summer- 
field’s future exertions will give him 
a title to rank high in his profeffion. 
Paul, the Emperor of all the Ruffias, condefcend- 
ing to vifit Kofkiufeow in Prien. Alexander 
Orton fki del. Gaugain feulpt. 
Kofkiufkow and the Polifo Nobles cbtaining their 
Liberty, by the generofity of the Emperor Paul 
I. Painted and engraved by the fame Artifis; 
publifhed by Molteno, Pali-mall, Price 3l. 35. 
the Pair. 
We were forry to fee the abilities ‘of 
Mr. Gaugsin {o much mifapphied, as 
in copying thefe Ruffian defigns, which, 
though they may. pafs for very fine 
things in Peterfburg, muft~be confi- 
dered in a very difierent light here. Jn 
the colouring they are gaudy, but not 
{plendid ; they glitter, but do not 
fhine. 
His Royal Higknefs the Duke ef Clarence, ex= 
graved from the Original, painted for the 
Town of Liverpool, by N. Shee, R.d. and 
dedicated to the Payor, Corporation, and 
Merchants of the fad town, by Fame 
Ward, for whim it is’ publifbed, Price 
IZ: Hs. 
This is a fair copy from the original, 
. which 
He alfo ufes the, 
