The Lehi sun. [volume] (Lehi, Utah) 1913-1949, 1921-05-12

Vermont clear to the Canadian boundary
Reports are that the damage is heavy In places.
For example, two experts OF the crop reporting
service In Missouri estimated the damage to fruits
and early vegetables at $10,000,000
The apple crop In Washington, Benton, and 9th
or counties In the northwest ArBBnsas fruit region
will be practically total loss Peaches and cher.
ries were killed and strawberries damaged almost
so per cent.
Dispatches said about 95 per cent of the fruit
crop in Oklahoma is ruined
II Is estimated that Nebraskas crop OF early
cherries, apples, pears, and plums is a total loss
The early varieties of fruit In some eastern
states also suffered heavily.
Early peaches, cherries, and plums probably
have been killed In southeastern Pennsylvania
The cold weather seriously damaged the fruit
crop in the southern part of Ohio, where the fruit
was far advanced
Thousands of Maryland fruit trees were In full
Hoom when hit by this frost. Growers In Wash
mgton county the center OF the western Maryland
peach belt, report the peach crop destroyed.
The fruit crop in Kentucky apparently was
killed.
Therefore the following article prepared by
the United States Department OF Agriculture is
worth the attention Of every fruit grower:
The weather bureau of the United States De-
partment of Agriculture has beer. able to discover
the weapon used by that old erpnly Of mankind
Jack Frost and in recent published report II
invisible weapon Is, and how, under ordinary con
ditlons, the sprtes own artillery may be used
against him.
Frost, of course, occurs whenever the mercury
drops to 81 degrees f. or lowe~ II much mols
ture is present In the atmosphere this drop In
temperature is manifested by the white crystals
Of frozen moisture upon leaf or grass stem, and
there Is what Is known as "white frost" II the
temperature drops To the required degree ana
does not reach the point when water from the
air Is condensed, there viii be few crystals de.
posted, and the result Is a "back frost"
"freeze' is the term applied TO condition OF cold
more permanent than frost, and such condition
may occur when there are high winds True
"frosts" only when the surface air is rel
atlvey calm.
Temperature like water seeks level During
the day the earth receives more heat than Il can
throw off, but at night this supply OF heat Is
stopped During the day the heat thrown Off
by the earth warns the thin blanket OF air next
the ground. This blanket, as II warns loses its
density and ascends. Cooling as Il rises present
ly It encounters air OF its own temperature anu
there II stops. Meanwhile fits place has been
taken by other colder air which Is In turn warmed
by contact with the ground This exchange goes
on until, at shutdown, all the air of a Wide layer
above the earth has been warmed, and the high
est temperature is felt nearest the earth.
Earth squsnders Its Heat.
Now, with the sunset, old earth begins to suffer
from bit of aerial trIckery. All day long he
has been patiently passing out heat to enc cold
air layer after another; night comes and with
It the loss OF his source of supply but do these
warm upper layers pass back any of the heat they
begged during the day7 They do not-unless
they are made TO. The layer close TO the earth
does, and thus they leave their coolest blanket
against the shiyering earth while they sail about
40 or 80 feet above their late benefactor serene
and warm and selfish, little caring that the spend.
thrift earth Is freezing his toes below.
As the earth becomes colder the air blanket
next his brown old skin becomes colder too, and
heavier as II becomes colder that the colder It
grows the more tightly II fits, and he has little
chance OF throwing OF his chilly cOyeret to seize
warmer zone. The EARTH too prodigal of his