Pittsburg dispatch. [volume] (Pittsburg [Pa.]) 1880-1923, 1891-04-19

AN admirable mode of opening and closing
freproof shutters from the outside with water
pressure from the hose mas been introduced
INTO various fire departments. The device can
readily and inexpensively be applied to ordis
nary shutters.
A PROMINENT railway journal makes the ex-
cellent suggestion that enterprising and pro-
Rressiye manufacturers should supply trade
papers to their men at their own expense, holds
ing that the increased efficiency thereby pros
NOTED would repay them many times over.
A TYPEWRITER which will do for music
what the ordinary machine does for speech or
written composition is a need of the age. ALI
though not devoid of difficulty, the idea is
quite practical one, the principal obstacle to
be encountered being the tendency to uneer-
tain alignment, when necessarily heavy type
faces, such as are formed by notes with bar and
ledger lines. have to be employed. The exist.
ing methods of either copying music by hand
or setting it up in type are so Iime-consuming
that any efficient music typewriter would be q
distinct gain TO the musical world.
THE degree of delicacy which has been at
tanned in the application of the radio-micro-
meter for the measurement of radiant heat,
viz: from a candle, fire, the sun, the moon,
the stars, or anything else which radiates heat
through space. Is marvellous. An appreeiaEle
effect is produced on the radio-micrometer by .
candle placed two miles away at which disc
tance its light is almost comparable to that Of
q barely visible nebula. Prof. Boys experi-
ments fully confirm the inference drawn from
earlier observations, that the heat of the moon
does not accumulate by penetrating beneath her
surface; 1t lasts only from moment TO momens
as supplied by the sum-
AMACHINE has been designed for making
bricks and tiles on the semi-dry process. The
clay or material to be formed into bricks is fed
into hopper into loose and granulated state.
The brick is delivered as the charger returns
to refill the empty mold Each brick receives
four distinct presses, whereby the air IS thor.
oughly expressed. All the labor required is
one man to tip the clay into the grinding pan,
and one boy to take oil the bricks as the ma
chine delivers them. Among the various pur~
poses for which this machine is employed be-
sides brick and tile making, are the forming OF
purple ore, or blue billy" into briquettes for
the smelling furnace, the forming of nickel
oxide into cakes for the assaying furnace, the
forming Of dry cement compound into blocks
ready for clinkerIng and the pressing of coal
and coke briquettes-
IN his accounts of experiments against tha
apple or coddling moth, Prof. s. A. Forbes,
State Entomologist of Illinois. states that the
result of once twice spraying with paris
green in early spring. before the young apples
had formed upon their stems resulted in saw.
ing about 70 per cent of the apples exposed to
injury by the coddling moth" Experiments
made by the Ohio Agricultural Experiment.
Station for two seasons on various varieties Of
cherry trees and plum trees have shown that by
the use Of two or three applications of arsen-
ten gallons of water, about three-fourths Of
the trees liable to 5e injured by the plum cur-
culio can be saved when fair amount Of fruis
is set: and that il an interval of a month or
more occurs between the last application and
the ripenng, no danger may be apprehended
from its use. It was also found that spraying
with arsenires is cheaper and more practical
than any other existing method.
IT is not generally known that an entirely
distinct school OF glass working has sprung up
in this country, which is accomplishing the
most wonderful results. To such q high state
has this artistic taste been developed that
prices are paid for single windows to-day In
private houses which would have seemed
fabulous ten years ago. Three thousand dollars
is considered by no means an extraordinary
price. For beauty, realism and magnificent
cOloring these high-class windows excel any.
thing that has ever been seen. The life which
is wanting in even the greatest paintings Is
possible of realization in glass, where light is
ever at work behind the picture to infuse is
with motion, color and feeling. The figure thas
can be only represented in the act of walking
in canvas pictures can be actually made "a
move when the sunlight plays on 1t through the
crystal of the stained window. Some Of the
modern pictures, consisting of many thousands
of pieces of glass. are Joined together with such
deft skill by clever leading that the lines of the
designs are presented in as perfect and uny
broken manner as they were in the artisrg
drawing.