1810.] 
fiints, colouring and glazing materials, 
with a very small quantity of water, mm 
grinding or reducing the said articles to 
powder; by which means much labour is 
saved, and the stoves employed to heat 
the rooms, or other places, for evape- 
rating the water used in the processes 
now practised, rendered unnecessary. 
The methods adopted hy the present 
patentee areas follow: = ; 
First. ‘‘ To manufacture ivory-black, 
take the bones and sloughs of the horns 
of animals, and calcine them to black- 
ness, in close or air-tight vessels, then 
crush them, in their dry state, between 
metal rollers of about two feet dia- 
meter, until they are broken sufficiently 
small to pass through a hopper into the 
eye of a mill-stone, and be reduced to 
powder between mill-stones, in an hori- 
zontal -situation, exactly similar to the 
method of reducing or grinding corn or 
grain to flour. By a like process, the 
powder thus obtained is then partly pas- 
sed through a dressing machine,. con- 
structed with brushes and fine iron or 
brass wire, upon a circular frame, in- 
closed within a rim, which receives it. 
Such part as passes through the meshes- 
of the wire (which should be about sixty- 
eight to an inch) is sufficiently fine for 
Monthly Retrospect of the Fine Arts. 
161 
use, and is damped down by a small 
quantity of water sprinkled upon it, aud 
packed for sale; the coarser part is res. 
turned to the hopper, and ground over 
again between the stones. 
Secondly. ‘In respect to the flints, 
potter’s clays, and colouring and glazing 
materials, the method is to take calcined 
flints, dried clavs, caleined lead and lead 
ores, Manganese, or whatever article is 
proper for glazing, and pass it under 
stampers or heavy hammers, to break or 
bruise it in small pieces, sufficiently small 
to pass between metal rollers, where it is 
crushed so fine as to be reduced to a pul 
verulent state; it is then ground in its 
dry state between mill-stones, in a mans 
ner suuilar to that before described for 
mapufacturing ivory-black. It is then 
passed through a dressing machine (ine 
closed within a very tight and close bian, 
which receives it); the coarser parts 
being thus separated, the finer parts are 
then mixed with water in a-tub or deep 
vessel. The coarser parts are farther 
separated by subsidence, and the finer 
and thinner parts passed through a fine 
lawn or cypress sieve: the water is then 
drained off, and evaporated by heat from 
the substance, and the powder thus ob, 
tained is of a superior kind of fineness,” 
a DO 
MONTHLY RETROSPECT or tue FINE ARTS. 
Lhe Use of all New Prints, Communications of Articles of Intelligence, &c. ure 
requested under cover to the Care of the Publisher. 
ra 
The Fine Arts of the English School; illustrated 
by a Series of highly-finished Engravings, from 
Paintings, Sculpture, and Architecture, by the 
most eminent English strtists; with historical, 
descriptive, and biographicul Letter Press. 
Edited by Fobn Britton, F.S.A, No. II. 
VERY attempt to illustrate and make 
} known the works of British artists, 
especially when executed on a liberal 
scale, is deserving of patronage and en- 
couragement. It is anotorious fact, that 
the British school of the fine arts, although 
in a vigorous and promising infancy, and 
probably the first at present in Europe, 
lacks that liberal patronage and en- 
couragement from the nation at large, . 
which alone can render it great and flour- 
ishing. The late rejection of the plan 
offered to government by the directors of 
the British Institution, and the jealous 
rivalry (so prejudicial to both institutions 
and the arts) between that society and 
the Royal Academy relative to their exhi- 
bitions, occasion these observations, 
which shall be resumed at-sumre future” 
Qccasiv, When the. existing differences 
between those societies shall have 
assumed a more decided feature. 
The work before us is the second Num, 
ber of'a publication, the objects of which 
we have before detailed and investigated. 
The contents of the present number are: 
—A Portrait of Romney. the Painter, 
engraved by Bond, from a picture by 
Shee, accompanied by a Memoir from the 
ven of Thomas Phillips, esq. R.A.; the 
_Expiation of Orestes, engraved by Bond, 
from a picture in the possession of Thos. 
Hope, esq. by Westall; an Engraving, by 
Bond, from a drawing, by H, Corbould, 
of a Statce of Resignation, being part of 
a sepulchral monument preparing for the 
Baring family, by Flaxman; and a Section 
through the Transepts of the Cathedral 
Church of St. Paul, London, engraved by 
John Le Keux, aftera drawing from actual 
measurment by James Elmes, Architect. 
The same care and attention to the gra- 
phic department is bestowed in this as in 
the former Number, and the plate of the 
architecture! Section is one of the most 
excellent specimens of architectural cor- 
rectness 
\ 
