Washington standard. [volume] (Olympia, Wash. Territory) 1860-1921, 1878-12-07

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How TIE weather y ForeeoI4.
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~ .ussnce, su ~ 'ne .s,esis s sehus .ns
news III oyer .ne county, W irom 'ne cen
'r11 sisnsl %'nce ~ Wasnius'ol. A.
we s.sn sec, PEesen'iy, 1oW Tue
s wS:.ner ). i! lo.s i'o !. Oiu iso1
ol,ltiss. Ait!ousn ~ nas proved sucH
IruitIul suo!ece OF aiscourse IN a.
sges' yst AZ airald many people VINO
pass remarks upon H. 40 not really
thlnk what the weather ID made OF. Lei
us examine its different elements.
The atmosphere has weight just as
water or any other fluid. although il
seems to be perfectly bodiless. We
must comprehend that the transparent
invisible air is pressing inward towards
the center Of the earth. This pressure
varies according to the state of the
weather, and the changes are indicated
by an instrument called barometer.
Generally speaking, the falling of the
mercury in the tube of the barometer
indicates rain, and its rise heralds
clear weather. Sometimes the rise is
followed by cold winds, frost and ice.
What these changes really indicate,
however, can be determined only by
comparing the barometric changes, al
certain hours, in q number of places
very far apart. This is done by the
Signal Service. Observations are made
at about one hundred and forty stations,
in different portions of the country, at
given hours, and the results are tele-
graphed at once to Washington, where
our faithful weather clerk" receives
them. reasoning out from them the
:, probao1lities which, ne publishes
three times IN every twenty'four hours.
But the atmosphere varies not only
IN weight, put also IN temperature.
Inc thermometer tells us OF such
changes. 49,,
BESIDES TINS, the ar contains great
amount OF moisture, ana ~ SHOWS as
much varianon IN TINS characteristic
as ID the others. For the purpose OF
are Of the atmosphere. an instrument
mas been invented called a "wet-bulb"
thermometer.
we are thus enabled TO ascertain the
"eignt or pressure, the temperature,
and the W0tuoSS OF the air. and now 1t