1822] 
is given to the carriage by the winch 
handle. There is a regulating screw 
_-in the centre, by which the pressure is 
adjusted with the greatest accuracy ; 
and the tendency whieh all wood has 
to alter its bulk with the atmosphere, 
has been remedied by a-very'simple 
contrivance in the carriage upon which 
the stone is placed. ; 
It may be inspected at the office of 
Mr. Charles M. Willich, No.8, Pickett- 
Street, Strand, where it is worked. 
It has excited some surprise, that 
lithography, though so much used in 
London, should «still be almost un- 
known in the ecounty-towns. of Eng- 
land. It is an art, applied with so 
much facility to so many different ob- 
jects, that we anticipate, at no distant 
period, its general introduction, 
—= 
To Mr. Avucustus APPLEGARTH, of 
Duhe-street, Christ Church, Surrey, 
for certain. Improvements in Printing 
Machines.—May 1822. 
The first improvement consists in 
supplying the printing-ink to the types, 
stereotype plates, or blocks, by two 
Sets of inking rollers, acting partly:on 
one side of the pressing cylinder, and 
partly on the other ; by which: means, 
as the form passes to and fro, it re- 
eeives its supply of ink without being 
carried out to a considerable distance, 
as is the case in other printing ma- 
ehines, where the form is inked en- 
tirely on one side of the pressing 
eylinder, and where it must be made 
to travel with considerable speed in 
_ order to pass entirely under the ink- 
ing rollers. By this improvement, the 
form traverses a shorter distance than 
usual, and, hence, the number of im- 
pressions, produced in any given time, 
may be increased in the same ratio as 
the traversing distance of the formis di- 
ininished, by which a saving of time will 
be effected in the operation of printing, 
The second improvement consists 
in the adapting and combining two 
paper-feeders with a printing cylinder, 
which revolves and prints in one direc- 
tion only. By this second invention, 
the printing cylinder can be supplicd 
with mofe sheets of paper, in any 
given time, than when one feeder only 
is used; and thus advantage may be 
taken of the increased rate of printing, 
which is obtained by means of the first 
improvement. Mr, A. claims as his 
imvention the inking the form of types, 
plates, or blocks, partly on one side 
and partly on the other side of the 
New Patents and Mechanical Inventions. 
539 
pressing or printing cylinder; and the 
combination of two paper-teeders with 
a printing cylinder which prints in one 
direction only. 
— 
ToMr.JAs. HOLuincrake, of Manches- 
ter, for making and working a Manu- 
facture for applying a-Method of 
casting and forming metallic Sub- 
stances into various Forms and Shapes, 
with improved Closeness and Soundness 
in Fexture, 
This invention consists in making 
and working a manufacture for apply- 
ing a method of casting and forming 
metallic. substances into various forms 
and shapes, with improved closeness 
and soundness in texture,-and which 
Mr. H. produces by making moulds of 
iron, or other . suitable materials, 
adapted to the form and dimensions of 
the article required to be made, and 
into which iron or other mould he in- 
troduces iron or other suitable pistons 
_or moving-plugs, properly fitted in the 
moulds, and each piston of such an 
area as shali-at least be equal to each 
of the same ends of any required cast- 
ing or-body to be made; and which 
pistons or moving-plugs must be 
brought, either simultaneously or se- 
parately, to press upon the lower and 
upper surfaces of any quantity of fluid 
metallic substance, that is intended to 
be formed into one body; before which 
he places a suflicient quantity of metal 
in any proper furnace, pot, or crucible, 
to be melted; and, when it issoreduced 
into a proper fluid state, he then pours 
or introduces into a suitable mould. 
placed in a vertical position, a sufi 
cient quantity of such fluid metal; and 
when it is so introduced into the 
mould, and then by means of a rapid 
continued, and adequate, mechanical 
pressure, acting on the lower and up- 
per pistons or moving plugs, he causes 
the fluid metal to be compressed into a 
much less compass or space than it 
would have naturally assumed by its 
own gravitation, under any state of 
ordinary contraction; and thus he pro- 
duces a peculiar soundness of exter- 
nal surface, and an uniform closeness 
of texture, commensurate to ‘the force 
or power applied and conveyed to such 
pistons or moving-plugs, and which 
pressure may be continued until the 
fluid metal is sufficiently fixed, and 
fully set into its required form, or to 
any stage of desired contraction 
Various methods, machines, and cou- 
trivances, familiar to any competent 
workman, 
