National Geographic : 1916 May
Efficiency built the Panama Canal, where inefficiency failed. Effi ciency enables the General to make one-third of all roll roofing made in America. Efficiency takes every advantage offered by men, money, mills and machin ery, and turns them to account in the manufacture of Certain-teed Roofing The General's efficiency comes from having enormous mills, perfectly equipped and favorably located for efficient manufacturing and distribution. Enormous volume and vast stores of raw materials, purchased to the best advantage, make possible the lower cost due to continuous operation. Certain-teed roofing is made of the finest quality roofing felt, thoroughly saturated with the General's own blend of soft asphalts. It is then coated with a harder blend of asphalts, which keeps the inner saturation soft and prevents the drying out so destructive to ordinary roofing. Certain-teed roofing is guaranteed for 5, 10, or 15 years, according to ply; but it will last longer. There is a type of Certain-teed for every kind of building, with flat or pitched roofs, from the largest sky-scraper to the smallest structure. Certain-teed is sold by responsible dealers all over the world, at reasonable prices. General Roofing Manufacturing Co. World's Largest Manufacturers of Roofing and Building Papers NewYork City Chicago Philadelphia St. Louis Boston Cleveland Pittsburgh Detroit San Francisco Cincinnati New Orleans Los Angeles Minneapolis Kansas City Seattle Indianapolis Atlanta Richmond Houston London Sydney Copyright, z196. GeneralRoofing Mfg. Co. - . Artistic in the true concept of the term, with its great musical qualities founded on a per fect mechanical construction that assures per manence of tone and retention of pitch. The most satisfactory of home pianos, the favorite in schools of high aim-the beautiful piano with the golden tone. Richly cased; mod erately priced. BOOK FREE. We ship direct if there's no dealer near you. . . - . . 7rrur There Is No Standard of Sound! Therefore the only way that you who are hard of hearing can pos sibly know whether a hearing de vice will make you hear clearly, is to try it in your own home under all conditions-And if the maker of it thoroughly believes in its ability to do this, he will let you make that trial without a penny of cost or even a deposit. That's one reason we are eager to have you try the "1916" ACOUSTICON No No Deposit F E Expense Another reason is that this "1916" Acousticon is not only protected beyond competition by U. S. Patents but has so many improvements and refinements, all making for greater efficiency, that many of our old customers who have tried it say that its effectiveness far exceeds even that of their old instrument which made them hear so well. WARNING! There is no good reason why everyone should not make as liberal a trial offer as we do, so do not send money forany in strument tor the deaf until you have tried it. Our fearless offer sometimes puts us a little behind in production. So we suggest that you send for your free trial today, while you think of it-just say "I am hard of hearing, and, will try the '1916' Acousticon, if the trial costs me nothing." Address GENERAL ACOUSTIC CO.,1311 Candler Bldg., N. Y. Toronto, Ont. Office, Royal Bank Bldg. "Mention the Geographic-It identifies you.'