National Geographic : 1915 Sep
I; K. Are you a good guesser? The General says:-No man living can take three differ ent kinds of Roofing and determine in advance, by such tests as bending, twisting, tearing, or smelling, how long each will last on the roof. The best you can do is to make a guess. That is why Certain-teed Roofing is guaranteed by us 5, 10, or 15 years according to whether the thickness is 1, 2, or 3 ply. Most roofings look alike, and even trained chemists can judge roofing quality only by the raw materials that are put into the roofing and not from the finished product. The responsibility of the biggest Roofing and Building Paper Mills in the world stands behind our guarantee, and this makes it unnecessary for you to take the risk of guessing. Certain-teed Roofing has made good on the roof throughout the entire world. Ask your local dealer for further information. He will quote you reasonable prices. General Roofing Manufacturing Company World's largestmanufacturers of Roofing andBuilding Papers New York City Chicago Philadelphia St. Louis Boston Cleveland Pittsburgh Detroit San Francisco Cincinnati Minneapolis Kansas City Seattle Atlanta Houston London Hamburg Sydney lllllllillllllllllllllllllllliiiilillllliiiiiillliliiillliilliillllliiillllli!l!illlllliiiilll|iiiilliiliiilllllllllllllllllilili l But not too pistol in Speedy! Speedy for a Goerz When "first-time" pictures are imperative- s when you must depend on your camera, not on the s sun or weather-use Goerz Lenses and Cameras. f Speed plus absolute reliability make Goerz Cam eras and Lenses indispensable to the professional & -to the amateur who demands maximum depth of field and sharp definition from edge to edge. Don't you want the "Goerz kind" of pictures? Your dealer has Goerz goods. The new tariff makes prices lower-don't forget that! SMITH Booklet free. Specify which-Lenses or Cameras. C. P. GOERZ AMERICAN OPTICAL CO. 815 Stockbridge 319A East 34th St. New York City tEverytenSmith &W. "Mention the Geographic-It identifies you."