Sunbury American and Shamokin journal. [volume] (Sunbury, Northumberland Co., Pa.) 1840-1848, 1845-04-05
Professor Espy's First Report OH NIeteoro-
lOgy,

Consists chiefly of charts. exhibiting, by vari-
Gus symbols, the winds and baromctic fur y
tions, and changes of temperature, which ac-
company storms as they pass from the western
to the eastern part of the United States for it
appears that all storms in the United States
travel towards the east We extract from the
report the following
CONGRATULATIONS.
lst The rain and snow storms, and even the
moderate rains and SHOWS, travel from the west
towards the east, in the United States, during
the months of January, February and March,
which are the only months yet investigated.
I'd. The storms are accompanied with de-
preston OF the barometer near the central line
of the storm.
81. This central line Of minimum pressure
is generally of great length from north to south,
and moves side foremost towards the east.
4th This line is sometimes nearly straight,
but generally curved, and most frequently with
It's convex side towards the east.
5th The velocity of this line is such, that it
travels from the Mississippi to the Connecticut
river in about tw wenty-four hours; and from the
Connecticut TO St. John, Newfoundland, in near.
ly the same time, or about 36 miles an hour.
9th. When the barometer falls suddenly in
the western part of New England, it rises at
The same time in the valley of the Mississippi,
and also at St. John, Newfoundland.
7ih In great storms, the wind, for several
hundred miles, on both sides Of the line of min.
mum pressure, blows towards that line, direct.
ly or obqnely.
Sh The force of the wind is in proportion
to the suddenness and greatness of the barome-
trc depression.
9th In all great md sudden deprcssions Of
the barometer. there is much rain or snow; and
in all sudden great rains or SHOWS, there is a
great flucuation of the barometer.
10th. Many storms are Of greatand unknown
length from The north to the south, reaching be.
vond our observers on the Cuff ot Mexico and
on the northern lakes. while their enst and west
diameter is comparatively small. TIE storms,
therefore move side foremost.
l1th. Most storms commence in the "hr
west" beyond our most western observers, but
some commence in the United States.
10Th. When storm commences in the Uni.
ted States, the line OF minimum pressure does
not come from the "tar west but commences
with the storm, and travels with it towards the
east.
18th. There is generally lull Of wind at
| the line of minimum pressure, and sometimes
a calm.
/ I4th When the wind changes 10 the west,
/ the barometer generally begins to rise.
18th There is generally but little wind near
! the line of maximum pressure. and on each side
of that line the winds are irregular, but tend
outwards from that line.
| 10Th The fluctuations Of the barometer are
generally greater in the northern than III the
southern parts of the United States.
! l7th The fluctuations Of the barometer are
| generally greater in the eastern than in the
western parts of the United States.
18th. IN the northern parts of the United
States, the winds, in great storms, generally sets
! in from the north Of east, and terminates from
north Of west.
! 10 h. In the southern parts of the United
! Suites The wind generally sets in from the south
Of east, and terminates from the south of west.
20h During the passage Of storms. the wind
generally changes from the eastward to the
westward by the south. especially IN The south
ern parts of the United States.
Accompanying this report is circular ia the
! friends of science, on the subject of ARTIFICIAL
ruins containing mary certificates Of gentlemen
Of high standing, in various parts OF our conn'
try, that rains of great extent were actually pro-
duced before their eyes, precisely as predicted
| by Professor Espy. The clouds were seen by
them to form in clear sky, right over the fire,
and pour down flood of rain, which increased
| in magnitude at least twenty eight miles East
of the place of Beginning, whilst It rained none
| 10 the West Several OF these rains took place
! in pennsylvanis, last summer, and some ot'hen
in Indiana, two summers ago All occurred IN
extremely dry, warm weather.
We are at liberty to publish, also, written
statement of Judge Calron, of the Supreme
Court OF the U. S. After mentioning number
of storms which have occurred from time Il
time in Tennessee, exhibiting phenomena which
he and Judge NJ. w. Brown think can only b'
accounted tor by an up-moving current in th'
middle OF them and Tins confDTm 10 Espy's the