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Ben D. Cooley

Commercial Photographer Phone 23342

1221½ N. 1st Ave. Phoenix, Ariz

Books-New and Used Old Stamps and Coins

Bought and Sold

ARIZONA BOOK STAMP & COIN CO.

209 N. Central, Phoenix Phone 31854

The Colorado Builders Supply Co.

Specialists on Reinforcing Steel, Mesh. Guard Fence, Fence Stays

1534 Blake St., Denver Plants at Denver and Pueblo

At the Gateway to Grand Canyon National Park The WHITE GARAGE, Ltd.

All Car Service WILLIAMS, ARIZONA

Official AAA Garage

Telephone 111.

ON THE MAIN STREET OF AMERICA

RUSSELL Better Built Road Equipment

We do not know how many years a highway of Gilmore Asphaltic Road Oils and Binders will serve. We have been laying them for only 25 years. Gilmore Oil Co., of Arizona P.O. Box 787, Phoenix, Arizona

Arizona Tractor & Equipment Co.

240 W. Jefferson St. Phoenix Phone 3-1146

HULSE & DICK Ford Products

YUMA, ARIZONA It's our pleasure to please our customers 24 HOUR STORAGE

ENGINEERS AND CONTRACTORS

You Will Find Value in the Pages of

ARIZONA HIGHWAYS

Price 10c per copy-$1.00 per year On sale at Newstands Advertising rates sent on application

Safe for all kinds of driving~ Economical in construction~ THAT'S THE MODERN PAVEMENT!

When your paving is Non-Skid Asphaltic Concrete, heavy gradesquick stops “hairpin” turns, hold fewer dangers! The safety factor, built right into this road surface, reduces the peril of skidding to a minimum.

Stone chips pressed into the Asphaltic Concrete surface provide a smooth attractive ribbon of highway with just enough tiny indentations to afford automobile tires a sure, firm grip in all kinds of weather.

You take safety, smooth riding, freedom from glare for granted on Asphaltic Concrete pavements, but they'll also save you money on construction costs and upkeep! Many Asphaltic Concrete highways, with practically no repairs whatever, are still standing up under heavy traffic after 15 or 20 years' service!

These are the reasons Non-Skid Asphaltic Concrete has been adopted as “Standard” by the California State Highway Commission and by some 230 odd towns and cities in the Pacific West States.

Investigate Non-Skid Asphaltic Concrete before you pave.

Asphaltic CONCRETE NON-SKID pavements

Everyone working for highway safety should read this pamphlet. Complete information regarding manufacture, exhaustive tests, installation, repair, and suggested specifications are given. We will be glad to send you a copy

The shock cushionedlives saved

Page “Hi-Way” Guard protects as it saves. The netlike fabric stretches and absorbs the energy of impact -the car is stopped gradually.

Page “Hi-Way” Guard is economical-easy to install and quickly repaired. Write for complete information, prices, etc.

California Corrugated Culvert Company Care of Vic Householder, Dist. Sales Mgr. 1330 E. Brill Street, Phoenix, Arizona

PAGE HI-WAY GUARD The Lifeline of the Highway Carbon-forming oils got an awful blow when “MODEL A” succeeded “MODEL T”! modern motors have no room for hard carbon!

In the excitement of new models and new body-lines on so many different cars these last few seasons we've almost overlooked the great est change of all-a change in motor design.

No longer are motors slow and in efficient, with big roomy spaces for carbon to gather. Pistons now reach almost to the cylinder head-within 1/32 of an inch in some motors. Increased efficiency is the order of the day. It accounts for the greater power, economy, speed of the new cars. The new Fords you now see by hundreds get their power from such an improved motor.

Yet there are people who wish you'd never even heard of this change in motors.

They are the refiners of motor oils that form quantities of hard, gritty carbon. Such oils were bad enough in old-style roomy engines. They are ruinous in the newer cars!

Hard carbon causes knocking, engine strain. Flakes chip off and grind through tight pistons and bearings. Particles get under valves, making them leak power, warp, burn quickly.

There is one motor oil, however, that lubrication engineers pronounce ideal for present day lubrication. It actually forms only 1/3 to 1/5 as much carbon as even the costliest oils sold! The little it does form is just a soft soot carried away easily by the exhaust.

It is Shell Motor Oil. The new high-vacuum process by which it is made gives it other important qualities, too. It withstands violent tem perature changes which would break down old-style oils. It holds its body -not only when it is cool but un der the intense heat inside a high compression motor.

Once you begin using Shell Motor Oil you'll tolerate no other kind.

Even the most expensive oils form more carbon. A sample of this oil, when burned, left more than three times as much as Shell Motor Oil An equal sample of Shell Motor Oil left only this small fraction of carbon-and it is soft carbon, not the hard, gritty, damaging kind Beneath the hood of the new Ford is a sturdy modern motor. It will give you wonderful service, sustained high speed, long life-but remember that there is no room in it for the handful of hard carbon which old-style oils would soon deposit

SHELL MOTOR OIL

Shell 400, the "dry" gas, is made "dry" to protect your oil from the crankcase dilution caused by ordinary "wet" gasolines. Even Shell Motor Oil çan be ruined by thinning with "wet" gasoline