1803.] 
that he is not only a man of science, but 
that he is enthusiastically attached to his 
profession. The object of his invention, 
for which he has now obtained letters 
patent, is to prevent those diseases to 
which the feet of horses are subject, par- 
ticularly that called the contraction of 
the hoof. This ‘disease proceeds from 
the hoof being exposed to artificial and 
unnatural heat in the stable, or from the 
frog not receiving its due degree of pres- 
sure: hence we have a shoe invented to 
prevent the contraction of the heels, 
though the frog should not be in contact 
with the ground: this shoe is said also to 
be more firmly united to the hoof, than 
any other hitherto employed. Another 
advantage is, that it can be applied with 
proper effect by the most uninformed and 
ignorant swith, as the dilference in this 
from all other shoes, consists merely in 
the inner and posterior part of both 
heels of the shoe being turned up, so as 
to touch the inter and posterior part of 
both bars, by which means the heels of 
the hoof cannot contract, or the shoe 
have the sinallest degree of lateral mo- 
tion. The length of the turn-up of the 
shoe should be sufficiently long to em- 
brace the heel of the bar, and yet not to 
touch the hottom of the cavity between 
the bar and the frog. A bar-shoe may 
also be applied with a similar projection, 
‘to press against the heels of the bars. If 
the hoof is already contracted, the heels 
-may be mechanically expanded a little 
by a pair ef farrier’s tongs every time the, 
horse is shod, and the shoe applied so as 
.to press with more force against the bars: 
. put under these circumstances, the hoof 
should first be made moist by standing 
two or three hours in water, and the horse 
not used for a day or two afterwards. 
—— 
» MR. EDWARD MOORE NOBLE’S, (BIRMING- 
-  waM,) for a new Method of making 
“ Carbonate of Lead,” or, as it is usually 
called, ‘“* White Lead.” 
By this method lead is taken in thin 
_ plates, or s#iajl pieces, and placed ina 
@ 
* vessel that has some communication with 
the atmosphere; to this is added acetous 
acid, or a solution of acetite of lead, 
so that the lead may be partly immersed 
init; to this is introduced a mixture of 
 earbonic acid gas, and oxygen gas. The 
_ whole is frequently agitated: in order that 
the carbonate of Jead, when formed, may 
~ be removed, and a new surface presented 
to the action of the fluids, Another pro- 
Ges is, that, instead of lead ina metallic 
. Slate, the patentee uses an oxide of lead, 
containing such a proportion of oxygen, 
 @ will allow it to unite with acetous 
} acid, &e. in either case the carbonate of 
> 
New Patents lately enrolled, 
361 
lead is produced, and the peculiar white= 
ness depends on the quality of the ma- 
terials employed, and upon the excel- 
lence of the operation, The carbonate is 
to be separated from the mixture, and 
dried, in order to its being ready for ad~ 
mixture with oil. Sometimes it must 
be well washed to free it from impuri- 
ties. 
EEE 4 
MR. JOHN CURR’S, (SHEFFIELD,) for Spins 
ning Hemp for making Cordage, $c. 
To the axis of the common spinning- 
wheel, made use of for these purposes, is 
annexed a small drum, made of tin, wood, 
&c. about twelve inches in diameter, 
and about twenty-two inches long; upon 
this a smali cord, chain, &c. must be 
wound, of the length, at least, of the 
thread proposed to be spun, and by tur- 
ning round the spinning-wheel, the cord, 
chain, &c. (which should be fastened to 
one of the spinners) will at the same time 
turn off the drum, and give the speed 
which the spinners mast go. By differ- 
ent machinery, the cord, chain, &c. that 
points out thespeed to the spinners, may 
be used and applied in a different inan- 
net; but what Mr, Curr lays claim to! as 
his invention, is the cord, chain, &c. 
connected or applied in any way with the 
spinning-wheel, and the spinners of the 
yarns, which may, to a convenient diss | 
tance, keep up a regular connection be- 
tween them. 
—— 
MR. JOHN HARRIOT’S, (WAPPING,) for @ 
New Fire-Escape. : 
The Internal or Chamber Fire-escape, 
consists in. having a fastening made of 
wood, iron, or other metal, in the nature 
of a small crane, or in the nature of a 
hinge to fix to the bottom, top, or sides 
of any window, or other opening in any 
house or building. At the projecting end 
of this fastening, there are two holes, 
through which a rope is to be passed. At. 
one end of the rope an eye is to. be 
spliced, or tied for the other end to pass’ 
through, which then forms a slip noose. 
The rope is to be long enough, not only 
to reach from the window to the earth 
when doubled, but to extend several feet 
more, slanting from the building ; a small 
line is likewise to be added, fastentd ta 
the noose, This is all the apparatus 
wanting for the chamber fire-escape, and 
may be applied in the following way : the 
chamber fire-escape may be made to ship~ 
and ‘unship at pleasure, and may be 
shaped variously; and being secured to 
the bottom, top, or sides of any window, 
or other opening, with the rope passed 
or reeved through both holes at the p-o- 
jecting 
