The National tribune., 1889-05-09
10 be continued.
THE WEATHER.
Notable Occurrences for the Week Ending May 4,
1889.


BY LIEUT.. j. p. FINLEY, U. s. SIGNAL SERVICE.
Correspondence invited, suggestions desired,
and information cheerfully furnished. Every eff
fort employed to make this Bureau of practical use
to the readers of THE NATIONAL TRIBUNE All
communications should be addressed Feather,
TIE NATIONAL TRIBUNE Office, Washington, ID. o.
LOWS, OR AREAS OF WARM, MOIST AIR, CLOUDY
WEATHER, WITH GENERAL RAIN OR SNOW
AND HIGH WINDS.
Three such areas affected the weather of the
United States. One came from the East Gulf
States, one from the coast of Southern CaliIor-
MA and the third from the coast of Oregon.
Average progressive velocity ii miles per hour.
Average duration four days.
HIGHS, OR AREAS OF COLD, DRY AIR AND GEN.
ERALLY CLEAR WEATHER, WITH MODERATE
WINDS.
Two such areas affected the weather of the
United States both of which came from the
Northwest Territory. Average progressive We
locity 10 miles per hour. Average duration
three and one half days.
TemperdtUe.-The greatest fall in "a hours
C35o) occurred at Pueblo, Colo, on the GOTH
The greatest rise (300) occurred at Pueblo, Colo
on the Sd. The maximum (99o) occurred at
Yuma. AriZ., on the 30th. The minimum (1So)
occurred at St Vincent, Oak, OH the 18th and
30th. Frost occurred on the Both in Colorado.
Kansas, Nebraska aud Dakota; on the Ist, in
Minnesota, Iowa, Illinois, Missouri Indiana,
Ohio Pennsylvania and Michigan on the I'd,
in Montana, Wisconsin and Virginia. on the
4th, in Tennessee, North and South Carolina,
Georgia Vermont and New Hampshire.
Precipitati0a-Rain has been reported from
every State and Territory except Arizona.
Snow fell in Dakota on the 2Sth, Michigan and
Wyoming on the 29th, Wisconsin and Mime
sofa on the 1st, and in Colorado on the ID.
The heaviest precipitation lover one inch IN
d hours was reported from New York, Ten
nessee, Arkansas, Maine and Alabama. The
maximum in "a hours 1.26 inches) occurred at
Mobile, Ala, on the 1st
HiRdS-The highest winds lover 40 miles per
hour occurred in Dakota, Montana and Indian
Territory. The highest measured velocity dc
miles per hour occurred at Fort Sill, Indian
Ter.
RiUer8-The maximum rise go inches) oc-
Cured at Fort Smith, Ark, on the 4th. The
maximum fall "a inches) occurred at Parkers-
burg, West Va, on the 4th.
Existing Coaditioas.-A high Of large extent is
central in Alabama and Georgia. One Tor is
passing eastward from the Gulf of st. Law
renee, and another, the principal one, is NOV
ing southeastward from the Northwest Terri
tory. Rain in California aud Idaho, threaten
ing weather in Montana, Dakota and Washing
ton Territory. Elsewhere fair weather.
Facts to be Remembered.-1. 1t is important to
observe that dry air is heavier than aqueous
vapor, in the proportion of to 5, and hence a
cubic foot of moist air weighs less than a cubic
| foot of dry air at the same temperature. 2.
! The dry air of the atmosphere must be regard
/ ed as constantly endeavoring TO evaporate from
any water-surface as much aqueous -yapor as il
can contain. Saturation being defined as that
| point at which a volume Of air contains the
/ greatest possible quantity of aqueous yapor
| and the dew point as that temperature at which
! aqueous yapor begins to be precipitated rs
water. s. In the gaseous form aqueous vapol
occupies about 1000 times the space it does
when condensed to Water, and the frequent
! change from one form to another is a probable
cause of many great atmospheric disturbances