563 
the punch in deftroying the hinges, and 
Opening the concealed place. 
Obfervation.—It would be of great im- . 
portance could men of talents and genius 
devife fuch methods of ‘eeuriy as to ren- 
der the nefarious arts of the pilferer of no 
avail, inafmuch as prevention agaihit 
crime is preferable to punifhment on ac- 
fount of its commifficn. We have long 
fince been in poffeffion of locks which teem 
‘to fet at defiance the ingenuity of villainy, 
and we fhall be happy if Mr. Well’s 
hinges an(wer the purpofes ‘et forth in his 
fpecification. 
ee 
MR. JOHN STEVENSON’s (MANCHESTER) 
jor @ NEW METHOD and PROCESS of 
STORING aud DRYING TOBACCO, aud 
the PREPARATION of SNUFF. 
In the ftove defcribed in Mr. Steven- 
fon’s {pecification, there are two pans made 
like drawers, each capable of containing 
forty pounds of fuch tobacco as is to be 
dried, and a lower one in which may be 
put eighty pounds of fhuff-work. When 
the ftove is at work, and the tobacco has 
acquired a certain degree of heat, it mutt 
be alternately drawn out, ftirred, and put 
in again; the fame muft be done by the 
fnuff-work at every interval of about 
twenty minutes. Ifthe ftove get too hot, 
there are dampers and funnels to carry off 
the fuperabundant heat. 
trivances, the fteam may, according to the 
wil of the workman, be let out, or re- 
tained upon the tobacco or f{nuff-work.— 
‘Fhe conitru€tion of the ftove upon which 
this patent is founded, cannot be under- 
ftood without the help of figures. But 
the advantages faid to be gained by Mr.S’s 
method over thofe in general ufe, are, that 
the tobacco, by receiving the heat. thus 
gradually on two fides, that is, the part 
jying in the pans, and the part upper- 
moft, requires little working, or ftirring, 
fo that one man is enabled in the courfe 
of a day to dry twelve pans of tobacco, 
and twoof fnuff-work :—the tobacco will 
keep longer, make lefs fell, which is pre- 
ferved inthe tobacco, and it will retain lefs 
of the flavour of the fire. Befides which, 
the “great coniumption of fuel ufed in 
the common large grate is faved. 
ISAAC BIRCH’s (GLAMORGANSHIRE) for 
“ IMPROVEMENTS 2%, OF ADDITIONS fo 
- the FURNACE as hitherto ufed for 
SMELTING gad MAKING FPIG-iRON. 
The additions to the furnace‘in which 
the invention confifts. are two tweres and 
two tymps; and the advantages gained are, 
a, A greater quantity of metal is oDtain- 
New Patents lately enrolled, - 
By- other: con-’- 
[July-4, 
ed from the fame quantity of materials, 
than could be had by furnaces o/ the com- 
mon conftruftion. 2. A Iefs fire and lefS 
blaft are required ; and 3. The iron is of 
a much better quality. : 
MESSRS. RICHARD BRAYSHAY and WIL- 
LIAM M‘MAHON’S (LIVERPOOL) /oF 
(@ MACHINE for the purpofe of GAINING _ 
Qn INCREASED SPEED aud POWER #0 
‘ all MECHANICAL PURPOSES. 
This invention confifts ina power which 
Is gained, by a wheel acting in a horizon- 
tal or, perpendicular pofition, or by arms ~ 
acting inthe fame manner, and obtaining 
a circular motion either by wind or water ; 
and, when neceflary, by likewife adding a 
windlafs. If the power is taken from the 
water, the fails are bet made of wood or 
metal ; but, when from wind, of can- 
vafs. When a motion is to be obtained from 
the water, it is to be placed underneath it, — 
at any place where there is either current 
or tide, which has the fame effect upon the 
wheel as the wind has in au: ‘The 
windlafs pofleffes the advantage of a con- 
tinued motion without intermiffion, and of 
increafing or decreafing the barrel of the 
windlafs, by which means more or lef 
power is obtained at pleafure. To increafe 
the power of the wheel from which the 
motion is obtained, the arms are made to 
flide in a box at the centre, fo as to be 
either longer or fhorter, and by that means. 
of increafing the circumference of the 
wheel, or otherwife by enlarging the fize. 
of the fails, or the number of them. The 
fails or float-boards are fo contrived, as to 
be able'to play in a given fpace, being © 
fixed perpendicularly on the wheel, and 
faftened by a cord, fo that when the wind 
blows from any quarter, three-fourths of 
the fails catch it, and, by forcing the wheel 
round, thofe fails which are forced again 
the wind come up edgewife; but when 
paft the centre immediately receive the 
breeze, which produces a continued circu- 
lar motion. In fome cafes, two fails are. 
placed together, opening’ like a book ; 
when faced to the wind, they .cpen, and 
receive the full preffure of the current, by 
which means they force the -wheel round, 
but on returning, they fhut clofe together, 
and are forced againft the wind by the 
other fails, in acting edgewife, until ‘they: 
arrive paft the centre of the wheel, from 
whence the current comes. When ‘the 
face of the fails comes to the wind, it im- 
mediately. blows them open, and they, 
then turn the wheel round as_ before, 
The machine may be made moveable, fo- 
as to be conveyed from place to place for . 
the 
es 
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