GAZOMETER. 
zometer, made of glafs, furnifhed with a cock at top, and able 
to contain 34 ounces Troy of diftilled water. The div ied of 
capacity, cecal ae by actual meafurement, ae on 
the glafs with a diam BB, he fe€tions of two a 
ders of rien vite (or cal iron) » the outward one es ewed 
upon the folid sapien = which is made to project at its 
ower extremity, a rnifhed with a male fcrew, to work 
into a female lerew, with which the lower end of the ex- 
ternal cylinder is furnifhed. The fpace between thefe is fo 
as te be almoft filled up by the fubftance of the 
adjutte 
glafs bell, A, when dropped it, fo that the quantity 
of mercury neceflary to All up that {pace is ae le gad 
rae The internal cylinder i a co aes up 
rough its axis, the lower ead of which is Fura! thedss 
female {crew ant wering to the male {crew of the cock of a 
{mall = Cc. The recei ver, C, is of gla afs, ond open at 
the bottom. When this receiver is ufed, it is fcrewed into 
its is and refts upon a {mall cup or a Me mercury, D, 
in which the beak a retort, prions a bent ce 
tube, may roduced into 
feétion of a wooden ftand upon w! hich die a nies of ee 
vite or caft iron are fupported, having an opening through 
the top to permit the cock of the receiver, C, to be jo oined 
rr 
to a eek: tube of the internal ues B. Lhe 
A. H, 
ee mto the o : 
cock, to a“ in oe transferring, or mixing differed 
afes. k > n ela i 
ounces of water, for holding the acid wee when wfed it 
t 
portable air- at Be exiting the glo . Mya 
ts any part of a apparatus, 
aa on eres a aes may be faften N, a-double female 
fcrew. O, a {mall inftrument, of fervice in collecting {pilled 
a or transferring {mall quantities of it. 
avy’s Refearches, &c. “publifhed in 1800; contain 
ccount of a mercurial gazometer by Mr. Clayfield. 
he peculiarity of this confilts, = having the a 
to the cylinder fufpended by a ftring which runs in a fpiral 
groove fo as to balance the nae Baqeeide its ams 
in the mercury may be. 
1e §3d vol, of the Journal de Phyfique, 1801, contains 
a defcription of a new gazometer by Victor Michelotti, M.D. 
of Turia. "This eS however, can {carcely be recom- 
mended for its fuperiority. 
In the 13th ai of a. epee acer Magazine, 1802, 
Mr. Pepys has deferibed a new gas-holder. The apparatus 
is in fome refpeéts fimilar to dee recommended by Mr. Watt. 
A fmall circular ciftern is added at top, which is conneCed 
es ha gas-hol er by means of two ees — with 
It hasa ee a brafs é¢ock on t e, and a glafs 
eee ifter tube, fhewing the quan tity 0 of in a ided gas 
the level of the water. The following is a defcription of 
the zi sen parts, fiz.4. The gas-hoider, G, may contain from 
two to nS. *R, the regifter tube, the ends of which 
are plies into two tin fockets by corks at the top and 
bottom of the gas-holder, into which it ye oe both 
en pees of courfe the level of the water in the atus 
will always be feen in the _ and omen that of the 
* the water a and fhould be cau ght a 
gas. C, the circular ciftern with its two cocks and pipes, 
marked 1 an Cé abrafs cock on the fide, with a 
fcrew, to which bladders or a blow-pipe may be attached. 
O, an opening into the gas-holder, in which a pipe is fol- 
dered at fuch an angle, that when all the uppermoft cocks | 
ut, no water can poffibly efcape. But when a con- 
ng pipe rom a retort or other cea generating 
ah : introduced into this opening, then, as the gas paffes 
o the gas-holder, an equal quantity of water will’ be 
dlchanged at O into any veffel fit to receive it. Sp, afpout 
on the fide of the ciftern to enable the operator to add 
water, even when the receiver fills its whole area. H, 
handles to lift the gas-holder. Rc, a glafs deflagrating re- 
ceiver, flanding in the ciltern. A, its. adopting ae fee 
cock. aw ing ina acy wire prepared for 
bultion. "They re paffes thr 
difk of iron an vet Pp 
pher, &c. B, ab blow-pipe e witha gum elaftic tube, E, ca- 
pable ne joining the cock C &, 
o make ufe of this apparatus; firft fill the gas-holder 
with water, by clofing the opening, O, with a cork, and 
t eeping the circular ciftern full of 
water in the regiiter will be on a level with the top of the 
gas-holdez. Then fhut the cocks 1 and 2. You may now 
remove the “—- from the Paeee O, _ is then pre~ 
as is generating. 
any conven jent 
The aes lee then aed ‘the paral eae 
n full, clof 
fore, — may now - eafily removed or conveyed where 
it is wanted. tis required a glafs receiver, 
as oe with - the me es ving prevoully filled the circ ar 
ciftern a water, place it in the ciftern, put in the a 
ing cork, A, and ‘with the jouh pee to the Bae a 
ha aft fe receiver in which the water will rife till full. 
Then clofe the an two cocks, 1 and 2 
and the gas, will afcend inte a receiver, while the water w ill 
take its place in in gas-ho 
In the fame ie of the Magazine Dr. Warwick fug- 
geits a more fimple alteration of Mr. Watt’s air-holder than 
HE 
the above. It confifts in having a rim at the eg of Watt’s 
air-holde er, fo as to admit of a column of water of an in 
n depth above ae es cock, foldered to the fhorter tube 
n the top of the older 
In the 23d vol. 
of Nicholfon’s P ne se Journal, 
aes Mz. Cle of a 
has | iven a defeript meter 
gazometers, and is let ee into a ae oa or refervoir of 
water, like the upper cylinder cf Mr. Watt’s hydraulic 
bellows. xen in : 
cn the gas, ne cece it thee eee 
where it is bur i s daily receiving 
improvement, we . fhall defer. ce a fl “eferption of it 
till the article Gas-Lizht. . See alfo Lic 
Rules for reducing meafures of ae to nc order 
to reduce any given meafure of a gas to weight, the exact 
I “weigh 
