1810.] * Patents lately Enrolled. . O53 
like nature, two parts of the stone called liberty, or expels an equal quantity of, | 
Cornwall stone, or any other similar water from the. reservoir, by the cock,. 
vitrifiable earth: If this operation is continued until the: 
Or, (3.) thirty parts of clay or argil- whole of the water is expelled, any quan- 
Jaceous earth, twenty-five parts of cal- tity of gas which may be thrown into the 
eined iron ore, and two parts of Corn. reservoir, is allowed to escape bya waste 
wall stone : pipe. When the gas cools it cundenses,: 
Or, (4.) eight parts of clay-or argilla- «at which time the water, returging by’ 
eeous earth, one part and a halfofcal- the cock, fills the space, and prevents 
cined ivon ore, two, parts of Cornwall the atmospheric air from contaminating. 
stone, one part of calcined flint-stones,,.the gas. There is a box which is kept» 
one-fourth part of manganese: and. constantly full of water, aud syphons are: 
these may be varied to suit che quality of placed ing proper situations for raising: 
the article required. water from the box, and pouring it inte 
Any stones or earthy matters may be funnels provided with plugs to prevent 
employed that contain the earths above it from descending, and a pipe attached. 
mentioned, and hkewise manganese; to the funnels for conducting the water 
ah tl a read . . 
many different metallic ores and oxyds. whichis allowed to pass through them, 
may be used instead of the tron ore; and: and for depositing: it into another fuaneh= 
any earthy substances that can be _on a level with the top of the reservoir, 
blended together by water, and that will by which it is conducted by the pipe 
make a hard cumposition by baking, of nearly to the bottom of the reservoir,” 
a fit consistence for the articles re- thereby forcing the gas to the lamps. 
quired, When the lights are to be put out, the 
EI plugs are to be dropped down, which 
MR. JOHN MAIBEN’s, (PERTH,) for Im- cause the water to rise in the funnels, 
provements inthe Construction of Ap- and thereby.stop, the syphons, The pa- 
paratus for making Carbonated Hy~ tentee makes use of lead and iron tubes 
_ drogen Gus, and for using the same in where they are indispensable; but as 
Lighting Mulls, Factories, &e. economy in the erection of gas apparatus 
The gas is conducted from a retort is thé principal object, he makes pipes 
through a waterechest or condensing pit, of wood, covered. with guts of animals, 
to a tar-pit, in which the tar is first de- and coated with varnish, which he claims 
“posited; and then the gas is conducted as his own invention, He recommends 
by another pipe to a washing-box, where “for his reservoir a cylinder, whose height 
1t 18 immersed in the water at the lower is equal to its diameter, with a hemi- 
end, and ascending through the water it spherical dome roof, as, the best calcu- 
is purified, and then carried by.a pipe to lated to sustain the weight of water he= 
the reservoir. Mr. Maibenconsiders his low, and the weight or pressure of the 
reservoir as one of the most important atmosphere above. The reservoir to be- 
parts of his apparatus; it is an air-tight put into the same building, surrounded - 
vessel, constructed of any material that with columns at proper distances, one of 
€an contain gas and water, and may be which may serve as a chimney, the others” 
of any shape and size. When in use, for covering the pipes, and guarding” 
the reservoir is full of water or gas, or them from harm. On the projection of” 
both gas and water; but when a cock is_ the base, he sinks his washing-boxes, and © 
opened, the water in the ‘pipes falls to in the centre his céndensing pit and tar- 
the level of the upper part of the cock,’ pot. Whatever quantity of gas goes into 
while the water remains the same as the receiver, expels an equal quantity of 
before, being kept in by the weight of cold water to wash the gas, The water 
atinosgheric air. When-the reservoir is ranning from the pipe partly into the - 
; he Ps : : ; 3 
In that state, the gas generated in the funnel, which keeps the water in the tar- 
retort, after passing through the wash- pot to the same level, An inverted cone 
ing-box, enters the reservoir hy means of is put into the tar-pot, of the same ca- — 
@ pipe, and is immersed amongst the pacity witlf itself, to the upper part of 
water near the bottom, from which it as- which the pipe leading from the retort, 
cends, being specifically lighter than is fixed; and the under part is in the 
water, till meeting with a) flange fall of water. -When the retort cools, the at- 
sinall holes, is divided into small par- mosphere raises the water intv the cone 
ticles; and afterwards meeting with ano- ; 
ther flange, is ‘thrown into the midst of the vacuum ; when the water descends, 
the water; the gas so introdaced gives it is drawn off along with the tar by a 
Cocky 
through which the air ascends, and fills” 
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