Mexico weekly ledger., 1921-03-03
home Brew Good
IN SEVERE COLD
Two Popular Anti Freezing Sub,
stances WI Prevent Serious
Damage in Winter.
CALCIUM CHLORIDE IS CHEAP
1t Should Be Carefully Tested as II
Frequently Contains Impurities
and Free Aeids-Aleohoi Is
Somewhat Expensive.

There r two popular and easily
obtained a~ntifreezlng substances
which when used In proper proper
lions win prevent the radiator o n
tents from suffering damage during
cold weather, according to Ernest
Coler in Motor Life. The frst OF these
Is calcium chloride, the other alcohol.
Calcium chloride comes In the form
OF a salt, and is sold under its W
name as well as under various r O
prietary names which usually Indicate
its freeze-proofng quality. When pur-
chased In the open market calcium
chloride is cheapest as well as most
uncertain; it should be tested care
fully, since it frequently contains i'm
purlties and free acids which attack
aluminium as well as the metal and
solder of radiators. Blue lltmus paper,
when moistened with a calcium chic
ride solution containing acids will
urn pink. The salt may be neutralized
by the addition of soda ash or am
monia until the litmus paper no longer
turns pink.
Amount to Use.
me amount Of calcium chloride to
De used In the cooling system depends
On tne temperatures likely to be en-
countered and the capacity of the
radiator. Two pounds of calcium
chloride added to each gallon Of wa
ter viii keep the mixture from
freezing at temperatures not lower
than 10 degrees Fahrenheit. Three
pounds per gallon will withstand a
temperature as low as two and a half
degrees Fahrenheit. -Four pounds OF
calcium chloride In each gallon of wa
ter VIII pot freeze at 16 degrees below
zero. istst
The calcium chloride should be dis
solved In hot water, and care should
be exercised that none of the mixture
is spilled over the radiator or other
parts on which 1t is apt to leave a
somewhat unsightly white deposit.
whatever II lost of the mixture by
evaporation should he re~pIenished
from a saturated solution of calcium
chloride in water. Such saturated So
luton Is made up by adding the salt
to hot water until the liquid refuses
TO dissolve more Of the salt and a
layer of undlssolved calcium chloride
remains at the bottom Of the container.
... Cleaning Essential.
A point of great Importance is to
the radiator thoroughly before
rendering 1t freeze-proof with calcium
chloride solution. This cleaning is
perhaps most competently done by n
of the radiator cleaning compounds
sold by dealers. The cleaning itself
serves a twofold purpose. It frees the
radiator from accumulated rust, scale
and dirt, and incidentally Is apt to
open tiny leaks which previous to the
cleaning were kept closed by dirt. II
the cleaning were neglected the cal
cium Chloride solution would open
these small leaks in short order, the
solution, leaking out, would render the
spot unsightly, and a certain chemical
action would be set up at the mixtures
exit. All this Is avoided, however, IL
the radiator is cleaned out and all
leaks are repaired before the cooling
system IS filed with antifreezing soIu-
ton.
Denatured alcohol, enjoys well-de-
served popularity with motorists who
during cold weather render their radia-
tors and engine jackets immune to
damage by adding alcohol to the wa
ter. The advantages Of alcohol are
that it does not have any destructive
action on rubber connections or on
metal, that 1t will not form deposits
of foreign matter and produces no
electrolytic effects. The drawbacks of
alcoholic they may be called SUCH
are, that 1t is somewhat expensive,
and that it boils at lower temperatures
than water, and must therefore be re-
plenished from time to time.