Evening star., 1926-11-28

Other minor disadvantages OF al
cohol are that It's low boiling point
tends to keep cylinder temperatures
lower than normal, some OF the de-
naturantS have an unpleasant odor In
evaporation and nitrocellulose finishes
are likely to become spotted In case
| alcohol is splashed or spilled on them.
Alcohors initial cost is lower than
| that of almost any other antifreese
| solution and this fact distinctly IL
| factor in it's popularity. 1t should
be borne in mind, however. that con-
slant evaporation makes its replace
| ment often necessary. and this may
| bring the aggregate cost of Winters
protection up to the level OF other
| substances.
Whether It is used or not, glycerin
| deserves the consideration OF every
motorist. There are approximately
20 branded glycerin anti-freese prod
ucts on the market, travelling under
diverse trade names that may be con
| fusIng to the motorist. Every factor
studied glycerin seems superior to
denatured alcohol as an anti-freeze.
| From this premise, its advantages
| and disadvantages may be discussed
Glycerin Is Discussed.
In the first place, the giycerin
| however, is the fact that the solution
| has a high boiling point and is practi-
cally non-Volatile up to the boiling
point of its so per cent aqueous solu-
| ton, 225 degrees. Hence glycsrin
solution will last for the entire sea
sOn-on one very important condition.
That conditiC Is that the cooling
system be absolutely tight, that thera
| be no leaks anywhere in it No motor
| list should object to this for the pro
gressive car owner would want leak
| less cooling system even If he used
only water in it. 1t is possible 10
retain the hose connections that are
| at present on the car, but, IL you
decide to use glycerin, the wiser step
would be 10 buy new ones 50 az 10
assure positive tightness. Hose costs
| less than the glycerin that can leak
out the slightest opening.
Several other simple precautions
should be taken. One of these is to
see that the level OF the solution 10
kept three inches from the top or the
| radiator overflow pipe. Otherwise,
there will be loss when heat causes
the solution to expand. Engines that
cool with the thermo-syphon system
require an inch lower level.
To their credit, some glycerin max
ers recommend against using their
product for Nash, La Fayette, Wtliys
knight and Stearns.Knight cars. In
case an owner Is in doubt, he should
ask his dealer whether glycerin Is
adaptable TO his particular car.
One may use either the colorless
chemically-pure glycerin or the vel
low distilled commercial grade with
perfect safety The crude glycerin.
however, Is dangerous because 1t usu-
ally contains salts that corrode the
| radiator.
Mixes and Flows.
| Glycerin is miscible with water in all
proportions, but on account or the
| high specific gravity of the % per
cent product it is we'll to mix 1t with
the water before putting the solution
in the radiator. Many of the manu-
factured glycerin products represent
O. more dilute grade of distilled glycer-
in PropOrtionately more of this
type is required, but it mixes some
what more readily with water.
Glycerin is a siruplike substance
but mixed with water, it flows with
relative ease. With certain types OF
cooling systems in particularly cold
climates, however, it's viscouS quality
makes it inadvisable for use.
Summing up the advantages and
| disadvantages of glycerin, we have
| the following:
A solution that once put In the
radiator will give protection all Win
ter. 1t can be drained in the Spring
and used over again. Instead OF
freezing solid, as does water. 1t goes
into slush with less likelihood OF
breaking the cylinder block or radi-
| ator. The big feature, OF course, 10
the absolute assurance of protection
an adequate solution gives.
On the disadvantage side we have:
A solution that leaks readily In
case the cooling system is not ab
solutely tight. A higher first cost, al
Continued on Eighth PaGN.l