The Sunday telegram. [volume] (Clarksburg, W. Va.) 1914-1927, 1915-05-09

ost.s.S 10 discharged, and, Is 20, how
enc tell when the proper amount
bas been added!
rdS+tIIed water should be added be
fore the battery is placed Oh charge.
The solution should cover the plates
In some batteries the level is one-half
inch higher than the tops OF the plates
A battery can be tested at any time.
land obviously the only way tc tell
whether it is fully charged or not Is
! to test It in some manner. the gravity
method usually being used
wha. part does slyeerin play in an
anti-freeze solution?
Glycerin is used in anti-freeze soiu-
lions for the reason that it prevents
oratinS rapidly and thus preserves the
power OF the mixture 70 resist the cold
Q have trouble in starting MY car when
warm. Several times ! Rave had 90
get help from some one who could
spin Il. Spinning always starts Il. but
this am unable 20 Go. II always
starts readily IF thrown into high when
rolling down = grade.
The fact that you have no trouble IN
dicate Immediately that the trouble is
not in the ignition system II you will
try slightly richer mixture on tbe car
bureter it may relieve the trouble An
other possible cause Is that the valves
may be adjusted too close so that when
cold they close. but when warm there
is an air leak that dilutes the mixture.
Carbon trouble also acts this way at
times, and IL the motor has not been
cleaned out lately IT is suggested that
the carbon be removed. Another posi-
BILE feature which does come under the
head of ignition is that the dry bat
teries may be weak.
In drilling holes in pistens to make
them lighter how much can be taken
off and how should they be drilled?
You can safely drill eight three
eiEhths inch holes equally spaced
around the piston. In drilling place a
cylindrical block OF wood in the pfs-
ton. the wood just fitting This will
prevent the metal from cracking. You
can hold the piston under the drill
with your haCds.
Would = good iron rivet be suitable
TO rivet front cross member to tho
put on with steal rivets?
Good iron riYets would be suita bic
TO use on the frame OF a light car
The principa! stress endured by these
rivets Is one of sheer through the tend
ency TO rack on the part Of the
frame. 4 great deal depends upon
the manner IN which the rivetinS is
done For instance. it has been shown
in experimenting that : riret Is 6.5 per
cent weaker n = d...;c:l hoe than in a
punched hole and t-at by rounding the
edge of the rivet hole TIE apparent
steering resistance Is increased IL per
cent It is also true that Shee-ing re
sistance IL probably less for double
than for single sheer. and this is prob
ably due to the unequal distribution Of
the stress on the two rivet sections.
Experiments on the steering strength
of iron and steel rieets would indicate
that the proportion of iron 10 steel is
as 10 TO 221 This ratio Is said 70 be
valid only II the sheer IS IN a plane
perpendicular 20 the direction Of roll
Ing. which would be approximately ,
the case Ia your cross frame connec-
ton
WIS. arc the advantages and 1isad-
yantaces OF tho dick friction chain
drive compared with other types of
transnn ission now moro commonly
used7
The advantages of the friction trans
mission are that &c offers an Infinite
number OF gear ratios. is silent cheap
TO manufacture and simple The dis
advantage is that the friction disk
must be renewed every few thousand
miles. This is a small matter. but
worth noting. and the amount of
horsepower It Viii transmit under the
conditions found in automobile design
ia limited. Therefore It has never
heen used to any extent on large cars,
Int has found favor on some cars Of
medium size and on more small cars
The near set of my car is of the plan
s4ar-l type. When the low speed pedal
= nushed down TO start there 10 a
EnoeIc heard from the gear set at resu-
lar intervals. What IS the cause OF It!
Owing 10 the speed of the motor IN
starting out on low speed the knock
Won sneak Of possibly is 1T the outer
bearing or transmission shaft bearing.
where the car IS cransed- The DUST
and dirt continually working IN this
batbfft cut out the bearing Sunc4enS-
" to produce a knock at this point
This bearing has babbitt lining ana
must be poured to At the shaft
PLEASE explain whether there would
be any advantage gained by fitting
aluminium p'stens?
Aluminium pistons are lighter and
reduce the vibration because OF their
light weight The expansion OF slu-
r1iniurn under heat is greater than that
~ cast iron, giving great difficulty IN