Orleans County monitor. [volume] (Barton, Vt.) 1872-1953, 1889-08-26

udy. "A Slidll GuDc ABOUT f0OG Ill
diameter, with a funnel at the top
ten times as large as the main tube,
catches the drops or flakes and indi-
Gates the amount of rain or snow
fall. The amount. quality, and di-
rection in which the clouds are NOV
ing are also carefully studied. Some
of these different varieties, as termed
by meteorologists, are the 'sscirrus, :"
those that are light and fleecy; the
"stratus,'' those exhibiting streaks
or layers the sscumulus," those that
are bunchy and look like great mass
es of snow, and the s'nimbus,' or
rain and snow clouds. The relative
part of the sky covered with clouds
is also remarked and noted in tenths.
The velocity of the wind is meas
ured by the thermometer. This is
placed upon the roof of the station,
and consists of four hemispherical
| cups revolving in horizontal plane.
The cups communicate their motion
to vertical shaft, which is connect
ed with a speedrecording instrument
in the observatory. The velocity of
| the wind is then ascertained by null
tiplying this by three, it being known
| by experiment that the motion of the
wind is three times as great as that
of the cups.
These are the instruments for all
the observations used in calculating
the conditions and changes of the
weather. The most important work
of the Signal Service Bureau, is that
of making prophecies on indications
as to the future. This is done by
the officer in charge of the principal
bureau, his conclusions being based
upon the data received as to present
weather conditions.
At night from 8 o'clock until IL,
the headquarters of the Signal Ser
vice at the corner of Twenty-fourth
and M streets presents an animated
appearance. In one room half q
dozen telegraph operators are busy
receiving reports from stations, all
throughout the countrw. In another,
dozen men are at work making re-
ports and computations. One man
interprets the cipher kilograms Gall
kilograms are sent in cipher for the
sake of economy as they are bro't
in from the operators room. He
then reads the Interpretation aloud.
Half a dozen men record the reports
upon as many different charts which
lie on desks before them. The tenn
perature at each place is marked up
on the chart in blue pencil. The ba-
rometeric pressure, direction and We
locity of the wind is also recorded.
Three short blue lines represent the
prevalence of the clouds. Regions
of high and low barometer are shown
with red pencil, and lines are drawn
between isobarometrical points.
After the maps have all been made
out in full, the chief officer examines
them and begins the work of making
indications for the next twenty-four
hours. One of the great difficulties
under which he labors is the uncer-
tainty of the direction in which the
| low barometer will move
When science has ascertained this,
the task of making weather predic
tons will be much easier, and the in
dications sent out will then be almost
absolutely correct. At present, how
ever, this is the uncertain element,
and it causes many reports to go
wrong. Barometrical pressure fur
nish the principal data in determin
ing the future condition of the wealth
er. Rain, it is known, usually comes
in advance of the movement of low
barometer, and dry and cooler wealth
er in advance of high one. In the
vicinity of low barometer, it is
usually warm and the air is full of
moisture. When the barometer is
high, on the other hand it is cool and
dry.
The direction of the wind, too, is
toward the region of the low barom-
eter. If the barometer is low in the
northwest and high in the southeast,
southeasterly winds prevail and vice
versa. As the wind moves towards
the low barometer it becomes warm
er and rises, and passes back to the
region of the high barometer. In
this way current is kept up between
the two regions of the country.
The relative position of the two
also enters largely into computation.
AS soon as these reports are made
they are telegraphed at once to all
the principal cities of the United
States and also to Canada, and farm
er's bulletins are distributed at an
early hour every morning along the
different railroads in this country.
Storms are predicted by the relative
movement of the high and low ba-
rometer, and the predictions have
proved of great benefit. Cool spells
are indicated by the movement of
the high barometer, and farmers are
enabled to protect tender growing
crops from damage. : Washington
| Post.
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scroua, salt rheum and other diseases affections
arising from impure state or low condition of tn e
blood overcomes that tired feeling, creates good
appetite, and gives strength to every part of the
system. Try it.