Phenix gazette. [volume] (Alexandria [D.C.]) 1825-1833, 1826-11-25

Murphey squazed me hand, all ont O. friend. :
snip, sure!' Dennis hung his head, bit hi,
nails, and was confounded--then running n
her, casped her to his bosom, impressed hi, lam.
thern Jaws upon her lips-and vowed that he,d
not again be such vagabond as to be iealo,,
of Pat Mnrphey. Maggy skipped around in ex.
tacy, while the whole brood Of the little ORR.
hung around the knees of Dennis, and caresssd
their recovered father. 1t was happy day e.,
them; and never, since the days Of ST. Patriot
we're the O'Bogs and the McGiIpins so com.
pletely happy. They then took up their line os
march Tor home-they were happy, and we los,
the fee for the advertisement, Thus closed
the scene of the O'Bogs and McGilpns Of the
county Of Kildare.
Perkins high pressure Steam Engins-Bys
report which has been presented to the Acade.
my of Science at Paris on this subject it an
pears that the principles on which Mr. Perkn.
has proceeded in the construction Of his on.
gines are these, viz.-lst. If in metallic box.
the sides OF which are adequately strong.
quantity Of water be enclosed suffcien, 10 hlI
the whole Of the inside, the temperature oftha,
water may be raised to the highest degree with.
out converting it into vapour, there being no
space in which that vapour can develope itself.
IDLY. Tin one Of the sides of such box, filled
with water SO heated, an orifice be conJriyed.
communicating exlerlory with reservoir, Fl.
Their empty or filled with atmospheric air, more
or less dllated, the water " i'll not pass out thro'
that ori6ce in liquid state, but in state OF
vapour, raised to greater or less degree of ten.
sion. The advantages Of Mr.. Perkins appara.
tus are, the production Of an increased power:
the practcabiity Of governing that power; the
simpliication Of the machinery; the diminulion
of its bulk; safety in the employment Of
steam; and lastly, economy in water and fuel
A cylinder of nine inches and half in diane.
ter is sufficient for one Of Perkins engines Of
seventy horse power; while in the common sys.
tenn Of low pressure, cylinder of that size
would be necessary for an engine of two horse
power. Solely by the dilatation Of the metal Of
which the various parts of the apparatus are
formed, their joints become perfectly stopped
One of Perkins engines, of given power, does
not exceed in bulk a quarter of that of com.
mon engine, Of the same power. The essential
difference between ais apparatus and the old
engines consists in this--that in the latter, In
order to obtain prescribed effect, it is neces.
sary to make the steam act with a feeble de.
gree Of tension on very large surface Of pis.
ton; while in the former, steam ola high de.
gree of elasticity is made TO act on a very
small surface Of piston. The expansive force
Of water, carried to the highest degree Of tenn
peralure, may, while it remains IN liquid state
be easily overcome by the resistance of the
sides Of the vessel in which il is enclosed The
accidental fractures which take place in COM
mon engines are especially occasioned by the
large extent of surface on which the steam acts.
For example in common engine of seventy
horse power, three thousand cubic feet Of steam
acts on a surface OF thousand square feet
while in one Of Perkins engines Of the same
power, only ten cubic feet of steam acts on q
surface of fifteen square feet. The consump.
ton Of water in Perkins engine, compared
with the consumption in common engine, is
as eight to seven hundred. One Of Perkins
engines Of seventy horse power consumes
bushe and half Of Goals in an hour, while
common engine Of the same power consumes
thirteen bushels an hour. Such is the superi.
GRITTY which Mr.. Perkins ascribes 10 his inyea.
ton
Character of DR.. Parr: by hinsslf-From my
youth upward to the present moment ] never
deserted private friend, nor violated public
principle-l have been the slave Of no patron,
and the drudge Of no party--I formed my po-
litical opinions without the smallest regard &
have acted upon them with an utter disregard
to personal emoluments and professional hon.
ours; for many and the best years Of my exist.
ence, endured very irksome tolls, and suffered
very CALLING Notwithstanding my resources
by my wants; now so abound as to unite
competent income with an independent spirit
and, above all, looking back 10 this life and on.
ward to another, possess that inward peace OF
mind which the world can neither give nor take
away.