, 1859-02-10

Msleala from tho PAsdelphia da=etts TINT ,
atssentlJ Jfreoted steaNk generating apparat1a;
has been put in operation in that city, which
promises to avoid the chief difficulties aud dang
ess Of tbs hoilsr and to ah1ain poH4e all greatly
reduced cost. The sPpsFatas eopaiats Of 4
daab!s col. Of pipe into k4iih ~,Iar bid ir arc
$orted III denss spray ana around Which the
nrs risss vertically: The proportions of air and
water forced in By tho pump srs twenty-five Of
air to ono Of wster, ths pump bling worked BY
the exhaust stean- The experiments show 4
saTing in fuel over tbs old m=lhod thst IL scarce
lyeredib1e; but it, proprietors claim forits con.
stant performances saving Of only fifty per
cant ; also that it cannot explode, since tho
coils which are Of 1ap-welded boiler iron, will
bear two Thousand pounds to the inch Of pres.
cure, and tho safety.valre is Is large AZ the d.
aaaster Of the coils Tbere il also; no body pf
water in the generator to BE- intensely heated
pnder the pressure, Is in the boiler, which body
Of water. will instantly take on the form Of
steam if the boiler be broken to relleve the re-
ssfaining pressure, and admit the air. They
claim, also, that the small snd compact form
which may be given the apparatus il = great ad-
vantage-the, nest Of coils, With twenty. five
horse power, being bpt thirty inches vide 1t tho
bottom, twenty inches at top, and I've and
half feet high from the CRATE. Next theT claim
a great advantage in the dispatch with which
ssesu may be generated; and: lassiJ, perfect
safety and durability. There are no aues 10 col
lapse or joints to burn ont, and consequently
there arc. but few repairs required. A steam
drum, six feet long and seventssn inches in d.
ameter, lies across the top Of the coils, into
which they enter. The american aad Ga:tte
has tho following speculations - to tho appllea-
biliiy Of this invention to steamships:
4 most important question arises in regard to
the applicability Of this improvement 10 steam-
ships. In gil It's leading elements it appears to
be the deaideratum for rateamahips-saVing coal,
and space. and the terrofs Of explosion. There
il no apparent reason adverse to such applica-
tion. though. Of course, no 1Arge power has yet
been tried. 1t may be said tha: ali the requisite
guards against undue heat In tho coils exist,
since, If the heat Of the steam rises too high,
the engineer checks it BY turning on more Va
ter and If It sinks too low, BY turning the water
supply of. Hsfta dozen stacks Of coils might
be plsced aboard large ship. and the intenae
hest of the gigantic boilers and fierce fires now
in use, might be wholly avoided without any
diminution Of motive power generated.
The experience Of many previous steam de-
vices warns Us against too hasty acceptance Of
any form Of engine or steam generating appara-
tus but all will concede tho undue cost and
danger Of the existing steau boilers, where very
great power is required. Heat is lost in forcing
imposslbititiea frJm the mass Of water the boil
ers must hold and the result IL that great waste
of fuel and space. costly repairs aud terrible dis
asters attend the steam engine in its present
use on any very large scale. It Is well worthy
inquiry whether the device which exerts TWEEN.
ty.tye horse power 80 admirably and 10 chesply,
cannot BE- applied to the greater uses Of stean
tereAk