Edwardsville spectator. [volume] (Edwardsville, Ill.) 1819-1826, 1823-12-06

tuDe or tubes, Tor d ST. am generator. a
portion OF the tube IS to be collie up in
oplrals nearly touching one another, 50
as 10 iorni cylinder Of splr5ls, about
six inches in diameter, and Fl cen in, hes
long bat the size must b. greater or
less, according To the intended force of
he engine. The luei, consis ing of coal
is to be put IN this cylinder, which Is
also to contain several other cdnrent.lc
cylinders, formed Of spirals like the for
Ter, and enveloped in the tuel these in
ner cylinders must be at a convenient
distance apar', so thai the fuel nay pass
freely between them. The tpbes Of the
cylinders are 10 Communicate a. one end
With a forcing pump, which fills them
with Huld: and at the other, with the
working cylinder, into which the nuId is
o pass, healed sutIi iently 10 convert the
Whole into steam. 1Ne cylinders are To
he ioscd at both ends, when flied wltb
iual; and the nDzz t Of bellows shouli
-x.tnd lengthwise through their cent?,
iuil ol small holes, So as 10 blow the fire
IN every point, and raise II 20 the heat oil
4 snitr's iprge, whoa Is II 900 d grees.
Inc tubes may be made ot sun IN tai or
platlna the latter will be much the
best; lpr i is act only he str4nIss,, but
lucomparably The most durebe. beng
inaffected alike by fire, air aod wafer,
separately or combined. Tho n ZzIe =
he bellows at ledst must Be made OF thls
metal, or some majcrlal tqnalli mCom-
Dusuble. Ihe diameter Of he tubes
must be as small as possible, to ad nit a
free passage Of dc lald; the supsrori y
IT she engine, as VIII presently bo shcwn,
the lube. Is diameter may dosbiiess
b reduced 10 the twelfth part Of al inch
-eeralnly 10 the eighth OF ninea. Tae
nosi sal able leneta Tor each lnbe, can
be determined only by experience: but
ii VIII be safer to err, by making tne4
unnecessarily shor, Than by making them
Joo long; ior III he f5rmer case the Aud
nay be made 10 move through them
more slowly; or the + sisiance opposed
% he work 70 be done by the engine
slowly, as to give thc naid lime t. be
Sufficiently heated, in passing tbrIugt
the shorter tubes: bnt Il thev DC made
very l"Ds, ii Will be dlfii 'ali, pr perhaps
impossible % push s"ili lent q4antty
1t HoIi through tnem q ii then The hcat
Wouih become too great, I'LL the tubes
we're burnt; or week med BE- the solvent
power OF the heat, they Woui yield to
hc Increased expansive force OF the
iUid. About fifteen fest viii probably
b ne proper length and then each
yyiini4r VA! not De comprised of a SIN
ge tube, but a number Of collateral
a9es, passing round more o5iiqaely
/. wall be eX remedy easy 10 coDnec,
hese tubes, al thlir opposite ends with
ae lorcmg pump and the working cy in
der, IN such a way, that one oil mem may
re taken out, in few minutes, by anv
person, aad new one, kept tor the pur-
pose, Inserted il its place, s1apld any
Accideni or injury make ii necessary
II this generator should be more tiabie
10 injuries and accidents lhan any other.
On account OF the smallness of. tbe tuhe
composing ii; The impossi5ilily of any
mischief being done by the bursuna OF
50 small a tu5e, and lhe facility witt
which an injury can b repaired by takiBE
"ot lube and pu ing ID new one, viii
more than couaterbalance the evil.
| am unable to determine thc power
~ Inr / ~
know what quantity Of heated water a
'abe can produce, VIII N kept in heat
nt II coo degrt es, nor what force the
haid VIII eXeri BY expanding into sean !:
b1i can demonstrate with maihc,nati-
cal certainty, that this generator VII.
produce, on an average, one hundred
imes The power Of the celebrated engine
OF Perkins, which is thought to be so
wonderful and important: and can
show as necessary consequence, thai
it is suscep be OF appllca ions, still
more wonderful and important in their
results.
| will take for comparison, tube one
line in diameter; and a cylinder eight
iliCbte anu tGlrI ID diameter, anu tcn
feet LONG The latter be!ieve to be about
he mean SIZE and form employed by
Mr. Perkins. The diameter of the tube
is only hundredth part of that Of The
cylinder; and as the content is in pro-
portion to the square Of the diameter,
ten feet of the tube will contain only
zen thousandth part as much as the cy lin
der.-rhe force of an expansive fluid
against the vessel containing ii, is in
proportion to the surface against which
IL acts: and as the surface Of cylinder
is in proportion to its diameter, the in