Burlington tri-weekly hawk-eye. [volume] (Burlington [Iowa]) 1852-1855, 1855-02-10
A new mode IL ventilation has been rec.

A new mode Of ventilation has been rec
commended by the Massachusetts board of
Education, and is now being adopted in that
State. The ventilating boxes, instead ( be-
ing carried up through the roof by thew
selves, and terminating in q ventilator, the
sole dependence for producing current OF
air, are carried into brick chimney, which
| is circular in the inside, and encloses space
equal to the dimensions, Of the ventilating
boxes around the smoke pipe Of the furnace,
| of cast iron, which occupies its centre. By
this means complete ventilation is attaina-
bic ut all times, apd in all states Of the at
mosphere. 1851 t4
| A Hartford (Ct.) letter writer says that
owners Of Sharp's Riao company are now
awaiting the result of a trial Of brecch-
loading rifle, which took place before the
agent Of the French Government. This RI
fe is Of comparatively recent invention, and
is quite simple and perfect. The caps are
inserted fifty at a TINA. and rs each one is
thrown into the hammer as it descends, the
arm can be discharged with incredible rapid
| ity.
Among the many valuable uses in art and
medicines to which the beet root can be APP
piled is that of making pasteboard. A man
ufactory has just been established in France.
The Lake Superior Journal states ii at
some very fine specimens Of magnetic iron
have been discovered on the shores of that
lake, and that samples of il are te be tested
in the manufacture of steel. If the test
shows this Iron to be what the accounts Of
it represent, this discovery will be important
and valuable. SO important is superior
quality of magnetic iron, that several Of the
manufacturing houses in England are said
to have sent scientific men to this country
and the Canadas to test the iron ores, with a
view to discoveries of it.
Col. Elisha Rice, Of Hallowell, Me-, has
invented a new brake for railroad cars. 1t is
in the form of shoe, is located between
the wheels, and is intended to act upon the
rail instead of upon the wheel. 1t is worked
by levers in the same manner as the present
wheel brakes. 1t is composed Of sub
stance softer than the rail, so that there
can be very little expense on account Of wear
and tear. When the train is moving the shoe,
which turns up at each end to avoid hitting
bluntly any slight unevenness, IS about a
quarter Of an inch from the rail, and when
the lever is applied, the shoe is pressed down
in such a manner as to lift the wheels from
the track.
A mineral known as gas coal, found at
Torhone hill, North Britain, is used by
Mr.. Young, Of Bathgate, for the manufac-
ture therefrom Of what is called Paratine oil,
and, from the developments made in a re-
cent trial at Edinburg, it seems that this es-
tabishment makes yearly 100000 gallons.
There are many other establishments in Eu-
rope which obtain this mineral for making
oil and producing gas; and it is thought
that minerals of the same character and quail
ity might be found in the rich coal basins Of
our own country, especially in Virginia,
Pennsylvania, Kentucky, Indiana, and Mis-
souri,.
The cable containing the telegraph wires
for submarine communication between the
island Of Zealand in Denmark, and Scania
in Sweden, was sent from Copenhagen re-
Gently to Landocrana, where the sinking of t
in the sea is to commence. Both cable and
apparatus were manufactured in England.
twas expected that tho expenses of the ex-
hibitlon of Munich would be covered by the
sale of entrance tickets. They haze how
ever exceeded the receipts by 100000 to-
rims; and this large sum the government will
have to pay. The exhibition remains open
for 80 ,ys, from the 18th July to the 18th
October. The total receipt, exclusive Of the
season tickets, which were not very numer-
Gus amounted to less than eighteen thousand
dollars.