The Sunday Oregonian., July 13, 1913, SECTION FOUR, Page 5, Image 49

IDEA IS HELD WRONG
Heat Effect on Tires Not as
Generally Supposed.
LOWER PRESSURE HURTFUL
Experiments of Diamond Rubber
Company Engineers Show In
crease Is Not as Great With
Temperature at High Point.
Ttv V T -o ww-t-vt no I
Quite often you read In your morn
ing paper or some new and wonderful
discovery made by science. Tou are
not startled, because man has grown
accustomed to the rapid advance of
science. Tou take the new discovery
as a matter of course. Tou adjust your
ways of llvinar to fit the new discov
ery and pass It by as you would a
birthday something that time Is sure
to bring.
It will be no surprise to motorists to
learn that science again has come to
their rescue. This time discarding one
mnj cnensnea tneorles regard
lng tires.
Since the time the first
automobile tire was built In a
16 years ago. It has been the popular
uiici. among motorists that the air
' pressure In an automobile tire increases
. RTeatlv ATI O. hftt rlnv A1. . i i
- - " Aiu uu villa
; uiisapprenension many motorists are
! accustomed to rtinnlnir tholi- tlva.
low pressure, at times even deflating
, uicm, curing tne hot Summer season.
Experiments conducted by the en-
gineerlng staff of the Diamond Rub
ber Company recently proved conclu
sively that Increased pressure in an au
. tomoblle tire, due to the heating of the
tire. Is less on a hot day than on a
cola. aay.
, Temperature Curbs Pressure.
These experiments were worked out
on the basis of the proved theory tnat
me aosoiuie air pressure in any con
tainer such as a tire, the volume of
wnicn remains constant. Is In direct
proportion to the absolute tempera
- ture.
- The absolute pressure is obtained by
adding the atmospheric pressure of 14.7
pounds per square Inch to the gauge
, pressure. In order to obtain the abso-
lute temperature add 460 degrees to the
- temperature Fahrenheit, 460 degrees
being what is known as the absolute
zero. Applying this rule, a formula
can be worked out which will give the
rinai pressure due to Increase in tern
perature in the tire when runnlnar.
Actual tests show that a 84 by 4 tire
Inflated to a pressure of 72 Dounds a
cubic inch and run 25 miles In an hour
under average conditions on a day
when the thermometer Btands at freez
ing (32 degrees Fahrenheit), the tem
perature will increase 35 degrees. But
on a lay when the thermometer Is at
tne mean temperature (62 degrees
Fahrenheit), and the same tire Is given
the above test of 25 miles in one hour,
then the increase in temperature of the
tire will be 34 degrees.
Final Pressure Shown.
The experiments showed the final
v'wduib in ine tire to De vs.i pounds a
cubic Inch and the final temperature to
be 67 degrees when the thermometer
stood at 32 degrees, an Increase of 6.1
pounds a cubic Inch. When the ther
mometer stood at 62 degrees the final
temperature was 96 degrees In the tire
and the pressure was 77.6 pounds, an
Increase of 5.6 pounds a cublo inch.
When the thermometer stood at 90 de
grees the final temperature in the tire
was 123 degrees and the pressure was
only 77.2 pounds, an Increase of 5.2
pounds a cublo Inch. As a matter of
fact the Increase In pressure would be
slightly less than those noted above,
due to a slightly greater expansion of
the tire Itself, caused by the greater
pressure.
Of course this heating of a tire Is In
jurious to it, but whenever the pressure
In- a tire Is decreased, the heating of
the tire Is Increased, rather than de
creased, on account of the greater
bending of the tire and consequent
greater friction and generation of heat.
From the above It should be clear
that the pressure In a tire should not
be decreased on a hot day, as Is com
monly supposed, for the simple reason
that It Is Impossible to obtain an in
crease In the pressure, due to the heat
ing of the tire in service, sufficient to
in any way injure it.
Seeing the World Awheel.
William P. Mason, Jr.. of Troy, N. T.,
and Arthur Lyman, of Minneapolis,
have started on one of the most ex
tensive motorcycle tours of the world
yet undertaken by riders of the two
wheeler. Scotland, England, Holland,
Austria, Italy. Switzerland and France
are Included In their Itinerary for this
Summer. In the Fall the boys will be
Joined by George Harding, of Philadel
phia, and will then tour the Balkan
district, Greece. .Egypt and the Holy
Land. They expect to be gone about a
year.
Motorcycle In Emergencies.
Motorcycle Officer Gus Neuman, of
Gary, Ind., recently averted a serious
accident by the speed with which he
overtook a runaway horse on the main
streets of Gary. The horse became
frightened and immediately headed for
the business section of the city at full
speed. Mounted on his motorcycle, the
officer gave hot pursuit and succeeded
In overtaking the frightened animal
Just as it reached the crowded district.
a uuiun. i ii o naers win ais
trlbute advertising matter concerning
Bay City en route.
The Wanderers' Motorcycle Club of
Toronto, Canada, has grown so rapidly
tnat it Has become necessary to secure
larger -quarters.
Nine hundred and ninety-five mem
bers were added to the Federation of
American Motorcyclists during the
month or July.
Arthur Goddard and -James Hough,
of Aurora, 111., have started on a 1200
mile motorcycle triD to Cairo. nL
These riders are traveling for pleasure
and in addition will advertise the
home-coming celebration which will be
aeia in Aurora tnis Summer.
li-iDert Hubbard. philosopher and
autnor, will take part in the motorcy
cle tours to Denver to attend the F. A.
M. convention to be held there July
23-26.
During a five months' membership
campaign conducted by the Toronto
(Canada) Motorcycle Club, Wilfrid
Morrison secured 113 new members for
the club.
A Truiett and Percy Hall, of Ho
qulam. Wash., are making a motorcycle
tour of California.
Rev. C. W. Wharton, of Rensselaer,
Ind., and his bride, are going to spend
1 J i
- - j
.- N " ,
r
s t
f:;:;i:i53JS:iS:.::s;:
George D. Stacy, Portland Motor,
cyclist. Who Is Making; Name
in. East.
their honeymoon touring the continent
on a motorcycle. .
W. M. Fleming, of Salem. Or., baa
started on a motorcycle trip to New
port, R. I. Mr. Flemlnsr is not nukln?
a trial of speed but is merely traveling
mi pleasure, ana expects to amnd
ii-uin iuur to six montns en route.
POLICE DEFEND DRIVERS
ATJTOISTS HELD FATJTTLESS IN
MANY ACCIDENTS.
More Caution on Part of Pedestrians
Advised! as Means of Lessen
ing Injuries.
Motorcycle Notes
A MOTORCYCLIST has been detailed
to paint white bands on the tele
phone posts along the route taken by
the Hoosier Motor CJub on its tour to
Los Angeles.
After a chase of about I squares.
Motorcycle Policeman Harrison Will
iams, of Phoenix, Ariz., overtook a
runaway horse and succeeded in stop
ping It before serious damage was
done.
A feature of the police festival held
in New Orleans. La., June 30, was a
race staged between motorcyclists of
tne rorce.
Leslie Vandament. of Greencastle
Ind., who Is 60 years old, is an enthu
siastic motorcyclist. During the past
year he traveled 6000. miles on his
two-wheeler.
.
W. C. White, of San Jose, Cal.. has
Just returned from a 1650-mile motor
cycle trip In Mexico and reports the
roads In excellent condition. He only
encountered one puncture on the entire
trip.
Rev. Father McGinty, of Lansing,
Kan., Is one of the most enthusiastic
motorcyclists In Eastern Kansas. His
territory is about 20 miles in extent
and he covers it easily and quickly on
his two-wheeler.
, .
Two Bay City. Mich., motorcyclists
are planning a trip which will bring
Uiem, Into tne capital cities of each
New York and Chicago traffic police
or long experience say that a large per
centage of accidents attributed to mo
tor car8 are not the fault of the auto
mobile or of the driver. They say not
only are many accidents caused by
horse vehicles, street cars and other
forms of wheel vehicles, but that if the
public would exercise a little more cau
tion, and if children were taught to
keep out of the roadwav. the mimh.
or street accidents would be much dl-
minisnea.
.in many cases pedestrians seem
deaf, dumb and blind," is the way Fred
Vogler, Hudson and Reo man. nut it
in tne language of the traffio police
they 'go to sleep' In the center of the
street. The roller skate is responsible
for more accidents to children than Is
the motor car. Children's bicycles, ope
rated by small boys and girls of from
4 to 6 years of age possibly come next.
Ice skates have long been prohibited on
me streets in many cities; why not
roller skates as well?
"Traffio regulations against motor
cars and other vehicles are rigidly en-
torceu. let tne same traffic regula
tlons are totally disregarded by pedes
trians. Motor cars are under such
perfect control at almost all times that
given half a chance the driver readily
can stop his machine in a short dis
tance. In almost all cars, the power
of the brake la sufficient to pull the
car to a dead stop within a few feet.
"If sidewalk traffio was as strictly
regulated as street traffic, as is done
with vehicles, a great many accidents
would be avoided. A person who is
supposed to use the sidewalk and to
cross streets at the proper crossings
under direction of the traffio officer
has no more right to disregard such
laws than has the driver of the Street
venicie. -
BUIGK MAKES GOOD RON
IjONG tTPCOAST TRIP MADE
WITHOUT AXY XltOTJULE.
II. L. El teli a rd. Drives New Oar From
Redlands, Cal., to IndepenoV
enoe, Or., in. Few 'Days.
H. L. Fltchard, a young man who
was reared at Independence, Polk
County, and Is now at that place on a
visit to his parents, was In Portland
tnis week, and called at the Howard
Automobile Company to tell Manager
jnei ti. jonnaon of his recent successful
trip In a Bulck model 24 roadster from
rtedlands, Cal.. to his old home, at In
dependence. I
Mr. Fltchard has been employed in
the automobile line In Southern Cali
fornia for several years, and. the Jour
ney was unaertaxen that he might pass
the Summer with his tiarenta.
"My car was new and stiff when I
startea, ne said, "and my first (lav's
trip was to Bakersfleld over mountains
ana aesert, yet 1 did not boll the water
once. In fact I did not boll It once on
the entire trip, though other cars that
I met the first day all had water bags
on the side and filled up every time
they stopped.
"My second day's trip was to Fresno,
where I arrived about 3 P. M. after an
easy run. From there the third day
took us to Sacramento, a good long run
on a very hot day. The fourth day I
ran from Sacramento to Red Bluff,
where I began to get Into the hills, al
though not bad ones.
"From Red Bluff to Shasta Springs
there are mountains all the way, but
good roads, and it was not until the
sixth day that I ran into rain and only
went as far as Coles. They told me
Every
Goodrich Tire
is a
first
tt
EM ' ' 1 I
(2) I 1
El j .
fc '-ji- r -a n
You always know when you buy
Goodrich Tires that you are getting
all the "best" that can be put into
tires, and that you will get that
"best" from them.
Forty -three years of buying
crude rubber, compounding it and
manufacturing things of it means
a lot. - It means that the rubber,
which is the life of your tire, is
compounded bo that . every bit of
the buoyancy, resilience, resistance
and tough, mileage-giving wear is
retained.
It is the Goodrich principle of
Unit Molding which makes each
Goodrich Tire tread, body and
all a single, layerless structure
full of life and durability.
Goodrich Unit Molded Tires
make good" for themselves.
The thick tough tread, the layers
of pure rubber, the side strips, the
bead, the layers of fine stout fabric
j-all are unified inseparably in the
Goodrich single' vulcanization.
That is the reason why you are
free from the dangers caused by
weak spots or dead place which
come from over vulcanizing which
cooks the life out of the rubber.
The usual guarantee goes with
each Goodrich Tire, but remember
that the tire itself makes good.
Unit Molding puts the guarantee
in the tire gives It the liveliness
and road-resisting quality which
insure you long, continuously-uniform
wear and service.
Goodrich dealers, Goodrich
branches and Goodrich service sta
tions are alertly ready to satisfy
the wants of the tire user immedi
ately. You can get any size or
style In Goodrich Tires but only
one quality. Write for our free
folders telling you how to get the
best service from any tire.
- Any car you own or buy will be
equipped with Goodrich Tires if
you simply specify them.
The B. F. Goodrich
Rubber Co.
Branches and Service Stations in
Principal Cities. Dealers
Everywhere.
Portland Branch i
S25-327 BtJRXSIDE STREET
Factories! Akron, Ohio.
There
is nothing
in Goodrich
Advertising
that isn't in
Goodrich Goodi
X-Ws
Are Your Spark Plugs "PLUGS"
OR SFA3K PLUGS?
We Handle Real Spark Plugs Here
ARCHER AND WIGGINS
OAK STREET, CORNER SIXTH
AUTOMOBILE SUPPLIES SPORTING GOODS
Write for Goodrich
Route Book, covering
the anto tour you se
lect. These books are
sent free on request.
there that It would be impossible to
cross tne Bisktyou Mountains In the
rain, so I waited until noon of the sev
enth dAV. anil Amv Fvrm; I".. 1
- w - - w . . . . I (J
Grants Pass In the afternoon.
x rom grants PaBS to Cottage Grove
was the only bad run we had on the
trip. The srrnd ran oa hia-h Da o r
cent and the roads were so rough that
t. l run on low gear most of the
time.
'I arrived a.t TnrlAranan.-
..uo tv t, j: . jxl,
tne ninth day, and my car was running
better than when I started, and all
that I did was to oil It and grrlnd one
valve on the entire trip.
"Now comes the wonderful part of It
all. I did not have a bit of tire trouble
of any kind. I used not more than one
gallon of water, and I got between 19
and 20 miles on a gallon of gasoline,
and 100 miles to a quart of oil."
Auto Club Seeks Road Improvement.
CENTRAXJA. Wash., July 6. (Spe
cial.) At a meeting last night of the
recently organized Centralia Auto Club
an emblem was adopted In the shape
of an auto wheel, the initials "C. A. C."
being inscribed la the hub and the
inscription, "Auto Club, Centralia,
Wash.," around the tire. It was also
voted to write a letter to the ity
Commissioners of Centralia and Che
halls and the County Commissioners
asking that steps be taken Immediately
toward the Improvement of the road
connecting the Twin Cities.
ens
liable
Su
ggestions
.1 V -
. ft.
Ml
Much pleasure can be added to your outing by being well provided with the
proper equipment. A few hints:
Refrigerator Lunch Baskets
Thermos Lunch Outfits
Thermos Bottles and Jars
Drinking Cups
Auto Trunks
Folding Pails and Basins
Gauntlets
Dusters ,
Caps ;
Robes
Extra Tires and Tubes
Emergency Sleeves
Tire Reliners
Folding Stools
No trouble to show you our goods.
OUR AIM: SERVICE AND COURTEOUS TREATMENT
BALL0U & WRIGHT logffl l.$
Seattle Store 817 East Pike St.
Bosch Magneto
Rayfield Carburetor
Stewart Speedometer
Warner Speedometer
Indian Motorcycle
Service
Ballou & Wright
BROADWAY AT OAK
Phones, Marshall 5860, A 6638
OTfTlh HUDSON
AUTOMOBILES
C. L. BOSS tT Crt r0rtla"l A"T- vTa.hlntn St.
"WOO VX, Phones Marab.aU 4028. A 485.
BOWSER i
GASOLINE and OIL TANKS
VA'? ?.?XBMS FOR PUBLIC AND PR I.
"AUAkES. s. u. Stoddard. Represents.
Uve. 303 Columbia Rifle Bl&lja U7t,
mm
VolcnUln, mnd Retreading. R. R. HLODGETT. 28-81 North 14th St. Main ,003.
FOR
DA- O ci t n
Dm. cicrauu x oieret v,o.
AGENTS
450 Hawthorne Ave.. Corner 8rti
Phone E. 64S
EEO HUDSON LITTLE
NORTHWEST AUTO CO.
DISTRIBUTORS
, - F W VOGLER, President
617 Washington Street. Phones Main 8887, A 4959.
AUTOMOBILE AND SHOP SUPPLIES
Spark Plugs TOOLS Brake-Linin
MOTORCYCLES AND ACCESSORIES
Freer Tool and Supply Co.
74 Sixth and Sll Oak St a. . . .
Phone. Main 1683. A 1682
FOREST DIVISION IS MADE
Minam OfHce to Be in Baker City
Under Supervisor Barnes.
LA GRANDE, Or., June 28. (Spe
cial.) The division of the Ml nam and
Wallowa National forests, which has
been under consldef ation for some time-
has been completed. Deputy Super
visor Barnes, formerly of Wallowa, now
has offices in Baker, and is acting: su
pervisor of the Minam National forest.
The Minam National forest Is that
part of the Wallowa National forest
lying south of the Minam Eagle Cap
V ".V1 rk of tno Imnaha River.
The Wallowa forest will now com
prise all that part lying In Wallowa
county except a small portion lyin
south of the Imnaha River. N. J. Bil
lings, deputy supervisor of the Wallo
wa forest and formerly from the Fre
mont National forest reserve. Lako.
view, now has charge of the Wallowa
office, Supervisor Harris being on a
trip In the northern part of the re
serve, where he Is overlooking tele
phone installation.- preparatory to bat
tling with the forest fires this Summer.
St.l Louis Black Hand francs now demand
payment of blackmail on the instalment
plan.
Owners of Pleasure Electrics-
We Guarantee These Tires
10,000 Miles two Years
Nearly everybody now knows that
Motz Cushion Tires are easy-riding
and trouble -proof, but do you realize
the great economy of these tires ?
Do you realize that every set of
Motz Cushion Tires is guaranteed
for 10,000 miles two years?
Do you realize that the npkeep cost
on a set of Motz Cushion Tires is
practically nothing ?
Do you realize that foar, not five,
of these tires make a complete set.
What if the initial cost of Motz
Cushion Tires i a trifle more than
pneumatics, is not the additional cost
paid back ten times over ?
They Ride Easy
Motorists and motor car makers
once thought that only pneumatic
tires could be maty riding and resili
ent, but Motz Cushion Tires upset all
calculations. Thousands now know
from experience, from aming Motz
Cushion Tire; that they were wrong.
They know that no pneumatic, except
under excessive speed, is more resili
ent than the Motz.
Note the construction of this re
markable tire. Noto the double,
notched treads (A in picture), which
prevent skidding and distribute the
weight to the sides. The sides are
undercut (see B), which allows free
action of slantwise bridges (see C).
These bridges are elastic. They give
and yield like the air in a pneumatic
tire. Note D in the picture, showing
shock-absorbing qualities when tire
runs over a stone.
Needless to say, Mot Cushion
Tires end all punctures and blowouts.
MOTZ
Cushion Tires
All Leading Electric Car
Makers Adopt Them
The demand for Motz Cushion
Tires in two years has multiplied ten
fold. On every boulevard, in every
city, wherever electric cars are used,
Motz Cushion Tires predominate.
All leading pleasure electric manu
facturers have adopted Motz Cushion
Tires as standard equipment.
New Tire Book Ready
Motz Cushion Tires fit any stand
ard clincher, universal quick-detachable
or demountable rim.
Our latest Tire Book, is now ready
for mailing. Don't fail to get a copy.
Send a postal today and get acquaint
ed with the tire that gives utmost
riding comfort, utmost convenience,
utmost mileage, utmost economy.
Give specifications name of car.
model, size of rims, etc
The Motz Tire and Rubber Co- Fac4or, Execave otoe.
AKRON, OHIO
Service Station In All Principal Cttle.
Chanslor & Lyon, Distributors
t PORTLAND, OREGON