The record-union., 1891-02-13
ANYI-CYCL0NES.
The Difference Between this Species
and the Regular Cyclone.
Lieutenant Finley, of the Signal Serv-
ice, Says Both are Beneficial
to Mankind.

Lieutenant John P. Finley, who is in
charge of the Signal Service on the Pa
cific Coast, has issued the second of his
interesting series of publications defining
the use and significance of the various
meteorological terms. His first paper, it
will be remembered, was treatise on
cyclones, and was published in full in
the RECoRD-UNIoN at the time
Lieutenant Finley's latest bulletin
treats of the 'sAnti-Cyclone."
1.-THE employment of this term for
meteorological PURPOSES says the Lieu
tenant, naturally follows the use of the
word 'cyclone.' The prefix ANTI
indicates the existence OF circu-
latory system in the air directly con-
trary to that which prevails in the
cyclone. AS the circulation of the air
currents differs widely from those of the
cyclone, so also are the
ACCESSORY PHENOMENA
Ofan opposite nature. The anti-cyclone
is an area of high barometer in which the
atmospheric pressure is decidedly above
the normal. The highest pressure is at
the center and diminishes thence out
ward to the circumference. The circula-
ton of the air is spirally outward from
the center. The air does not attain cir
ctllar motion anywhere within the area.
and the tendency to spiral movement is
only disclosed when the whole disturb
ance is charted and observations from
every quarter are available.
The circulation OF the air in an anti
cyclone gives rise to westerly winds on
the north side of the center, northerly
winds on the east side, easterly winds on
the south side, and southerly winds on
the west SIDE The
FOUR QUADRANTs
Of an anti-cyclone are distinguished as
follows: In the northeast quadrant, clear.
cold, dry weather, with winds of noder-
ate force. In the southeast quadrant, Il
cold wave, with the lowest temperatures.
clear. dry air and high winds. In the
southwest quadrant, fair, COOL pleasant
weather, with gentle winds and haze. In
the northwest quadrant, increasing tenn
peratyre, increasing humidity, cloud
formation and threatening weather.
The front ofan anti-cyclone is the eX-
treme rear OF a cyclone, and the extreme
rear OF an anti-cyclone is the front Of a
cyclone. The air moves downward and
outward in an anti-cyclone, and inward
and upward in a cyclone. The air which
flows outward from the top of cyclone
is cold and dry, because deprived OF it's
heat and moisture in the development of
rain or snow. This air descendS toward
=
formation OF the anti-cycione. There is
always an anti-cyclone between two
cyclones,
BOTH OF WHICH ARE FEEDING
The former and maintaining its identity.
The cold weather of an anti-cyclone is
partly due to the descent of cold air from
above, the horizontal flow of cold air
from northern regions and the effect of
radiation which is greatly augmented by
the absence of vapor and clouds. The
area of the anti-cyclone is frequently
greater than that of the cyclone and its
form less regular. Anti-cyclone is syn
onymous with clear, cool weather, mod
crate winds and a cold wave; and cyclones
with cloudy weather, rain or snow. high
winds and warm wave. The word high
on the weather map indicates the area of
an anti-cyclone, and the word low the
area of a cyclone. Both disturbances are
beneficial and necessary to the prosperity
Of mankind.''
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