The Oskaloosa herald. (Oskaloosa, Mahaska County, Iowa) 1885-1919, 1917-02-15

] understand that denatured alcohol
and wood alcohol both mix completely
with water. Will solution of Is per
cent alcohol and rs per cent water in
svaporating remain tho same solution
or will the alcohol evaporate more rap
idly than the water so that the solu-
tion will have a smaller percentage of
alcohol In II after about one fourth of
1t has evaporated7
The alcohol will be almost entirely
evaporated before the water diminishes
apprectably therefore after 20 per cent
of your solution has evaporated what
remains is almost entirely water, and
the solution must be replenished with
alcohol to, give the desired effect.
From this 1t will be seen that the
loss through evaporation would be very
great If undiluted denatured alcohol
were used, and il the car were used
to any extent refilling often would be-
come necessary, to say nothing of the
evaporation when the car was idle.
Will you please tell me why the pis-
ton 10 larger in four cylinder caro- than
in six and eight cylinder cars and why
they will develop more power than a
four cylinder2
The reason that the bore Of the four
cylinder motor Is In general larger than
that OF six and other multicylinder en-
gines is simply because of the fact that
more power than is necessary for the
car is not desired Every cylinder as
sembly acts as a separate engine In
supplying power. The same amount OF
power can be obtained from six smaller
cylinders as from four larger ones;
hence to secure the desired amount of
power with four cylinders 1t is natural
that each of the cylinders should be
made larger.
Looking at the matter from another
angle, that of piston displacement. IL
will be remembered that displacement
is direct factor of power. If dis.
placement of, say, 800 cubic inches, is
desired and If enough power will be
secured from this displacement ii
would be obtained by using four cylin.
ders of seventy-five cubic inch dis
placement or six cylinders, each hay-
ing fifty cubic inch displacement. Nat
urally the pistons for the seventy-fve
cubic inch cylinder will be larger than
those for the fifty cubic inch.
Can you advise me Of any remedy
for bowling in the rear axle of new
car? ] understand there are some means
of tapping the torsion tube which will
stop this bowling.
It is not advisable to tap the tor
8 n tube, although this would cut
d ,wn the resonance. In all probability
as soon as the gears have worn in
awhile this bowling will stop.
Can you give me complete directions
tpr removing scale and other deposits
fHom the radiator Of an automobile?
Scale can be removed from radi-
ators, by using a saturated solution Of
common washing soda and water.
Thorough. flush the radiator out with
the solution, then clean with fresh,
later A mixture of ordinary
washing HOuI NAlCA lOuI uuHNtS ulC
used to the gallon of water will do
the work properly. 49,. &c.,
Does the spark in a magnetic occur
when the points are together or just
brealeins2
The spark does not occur until the
instant that the points separate. 1t is
+, the separation Of the points which are
in the low tension circuit that induces
the current in the high tension circuit.
Therefore no current is flowing to the
high tension circuit until after the
breaker points are separated.
The reason for the spark being set at
upper dead center at full retard is that
a later spark than this is never re-
quired. When the engine is turning
over very slowly, requiring the latest
possible spark, il the setting is such
that 1t occurs on upper dead center
the engine will not knock, because be-
fore the spark could have taken place
and ignited the gases the piston will
have passed over the dead point and
be again on its way down.
have installed a motor driven tire
pump on my car, and directions say 10
run the motor at 600 revolutions per
minute. How 10 one to know when the
motor is running at this speed?
Directions do not mean that the mo-
tor has to run at exactly this speed.
The pump will work most efficiently
if this speed is Appropriated. Set your
motor so that 1t sounds about as 1t
does when your car is running fifteen
or twenty miles an hour; then run
your pump.
Can you give me a method Of scaling
frost crack in cast water jaeket7
There is double crack on the lower
side, with single crack on the upper
side extending horizontally along tho
center. The inside of the cylinder /.
not injured. Would you ad ise any So
buttons?
The hest way to remedy cracked CYL
inders Is to have them welded by some
responsible welding concern. There are
n number I'm any city uhn will raad,.y