National Geographic : 1917 Sep
This Bridge Was Built of Concrete Build Your Roads Also of Concrete Concrete is the building material selected by engineers for great bridges, buildings, locks, seawalls, foundations, and other structures that must everlastingly endure. Concrete Roads Are Permanent Concrete roads are the most economi cal of all types of permanent pave ments because they will successfully withstand the wear of traffic, and with negligible cost of upkeep will give 100% efficient service 365 days in the year. Concrete roads are dustless, mud less, and free from ruts and holes. The heavy motor travel of to day has made necessarythe building of roads of the strongest and most per manent material. That material is concrete. South Eighth Street Viaduct. Allentown, Pa.; McArthur Bros. Co., Contractors. Write today for Bulletin No. 136. It contains facts of great interest to any taxpayer. PORTLAND CEMENT ASSOCIATION Offices at ATLANTA MILWAUKEE CHICAGO NEW YORK DALLAS PITTSBURGH DENVER SALT LAKE CITY INDIANAPOLIS SAN FRANCISCO KANSAS CITY SEATTLE WASHINGTON, D.C. FOR PERMANENCE "Mention the Geographic-It identifies you."