Vermont telegraph. [volume] (Brandon [Vt.]) 1828-1843, 1838-07-25


By this means the engineer can a ways
diminish, but never increase'the pressure,
and bvo consequence the danger Rash
and inexperienced'a many OF our steam
boat captains are, it would often be unsafe
to entrusl the keys of the safety valve
with them Unless they have been proved
perfectly conpeten: and trustworthy, those
KEYS should on short trips, remain with
the agen, or owner. These valves should
ALSO be examined at frequent, regular ih-
tervals. -, |
With such preca ution there can be no
danger of exp losion from pressure OF
steam or, as It is generally termed, high
steam
The boiler, if of good metal, will bear
the strain of .onethird of the cohesive
force of that metal. In practice, twice
the maximum pressure on the valve can
be borne with perfect safety:-theretore,
if safety valve be loaded with 10 lbs. to
the square inch, the pressure of the steam
can be more than doubled before an ex
! ploson can ensue.
The next greatest and almost only re-
naming cause of the explosion of steam
boilers, is inattention in feeding with water.
! Though termed cause, it is most gener-
ally consequence or effect Of the former.
If the safety valve be too heavily loaded,
a great quantity of the water in the boiler
is converted into steam, which, wherever
it Is In contact, tends to heat the boilers
as much within as the fire does without
lcnnconnpn4lI nj -
boat by the heave of the sea; simulta-
neous movement of the passengers from
side TO side or any other circumstance,
causes the water within the boiler to run
against the intensely heated metal, when
a gas more powerful than steam itself is
instantaneousIy e. olved, and an explosion
Immediately enSueS.
Beside the gua9c cocks, some of the
English steamers have float attached to
each boiler, which by indicating the exact
height Of water in the bollor proves a
great additional safeguard
The American steam engines are in
some respects superior to the English
for instance in length of stroke, by which
greater speed is attained with equal pow
J err The length of the cylinder should
be twice that of its diameter, which is
very nearly the proportion of that of thx
, L. S. steamer Fulton. The Great West
ern, with p inches more of diameter has
only l-6 in length Of stroke. The Full
ton in smooth water is the fastest boat
and in almost all respects, save It's horl-
zontal position, her machinery is the best
NARROW ESCAPE FROM DEATH-Last
week, Miss Marv Clark, daughter Of Capt
DYER Clark of Midway, and one of the
! school teachers in that town, was passing
; through.a pasture containing a number o.
/ young cattle, on her way from her school
.. She was suddenly pursued and attacked
-, with great fury, by 3 years old heifer
o which soon overlook, and struck her Il
the ground with its horns. Her screams
brought no one to her relief, and the en-
. ragged animal stood as in triumph over II.
, PROSTATE victim, endaavoring to gore her
y The horns of the furious creature cauoh
: in her dress, and she was alterna,eI,
=, thrown into the air, and dashed upon TIT
[, earth with the greatest violence. He
r clothes were literally torn in fragment:
- from her bod y-and her books, maps anc
:. other articles which she was carrying
. home, were shlvered and scattered to the
wirds The wild and fiery eyebaHs o
the Infatuated beast were staring full ir
- her face, preparatory to a more dreadful
i attack; but still none heard her cry, none
. came to her rescue, and TO use her owr
y significant language, she "thought hcl
: hour had come, and she commended he
soul to COD, and believed she must di,
=. there alone.'
j But actuated BY tina: spirit Of true fe
male herolSm, which the hour Of imm
. nent peril will often develope, she resolved
g to make one effort more, and suddenI,
=, springing to her feet, she seized her deadi,
!. foe by the horns. The animal immedi
ately plunged at her with all it's might
but she held her firm grasp upon tn,
- horns, and making what defence she couIc
with her feet, ran backwards until sh,
came to a stone-waiI. ana here in the un
8 equal strife, a kind Providence, she hardI,
- knows how, enabled her to clear the wal
and escape,-covered with wounds ane
y blood and dust, to the nearest house.
, physician was called, every attention wa
- paid 10 her by the kind neighbors, AM
:, that evening she was removed to her faith
! er's dwelling, and is in fair way t.
b recover.
- The young lady had on a red dress an,
- a red shawl 1t is we'll known that som
:, cattle of peculiar temperament, are at
- tracted and enraged by appearances @
8 this kind, and this sad accident should b
~ a warning TO others.-Bosto~ Press.
% PRESERVING MILK.-A foreign Jour
y nal states that some milk was lately ey
hbitcd in Liverpool from aboard q S,red