National Geographic : 1925 Aug
!DOPLE Made by the internationally famous G. Rodenstock Optical Works of Munich, Germany, makers of Precision Binoculars for military forces of the world's leading governments. Thousands of these "Duplex" Binoculars sold to Army and Naval officers because they have met every rigid test. Rec ommended for their exceptionally high quality. Duplex Binoculars are compact and powerful, assuring unsurpassed illumination and a wide range of vision. Prisms cannot get out of alignment-distant objects can be seen with sharp, needle-point definition. Glasses can be used constantly without eye-strain. Dust and moisture proof therefore suitable for tropical use. Ideal glasses for Sports men, Hunters, Naturalists, Hikers and Tourists. GUARANTEE Every pair of Duplex Binoculars is fully guaranteed to be absolutely mechanically perfcct and exactly as represented, or money will be refunded. Call in person, or sent postpaid on receipt of check or money order for $23.75. ARMY AND NAVY SUPPLY CO. 243 West 42nd Street New York City Sole U. S. Distributors of Duplex Binoculars COMFORT INSURANCE FOR CLOSED CARS TURN T'ilE SWITCll-and out go stifling heat, exhaust fumes, smoke, dust and discomfort. They can't exist in the same closed car with a KNAPP SEDAN FAN TIIE SAME ITU'IN-and in come inexhaustible supplies of comfort, coolness and fresh air. All the Knapp Sedan Fan asks for is some of your surplus battery power. Attach it to instrument board, on back, top or sides. A moment's work. Too small ever to he in the way. Yet powerful enough to keep you cool the hottest day in the slowest traffic. No expense to run. No trouble. Points at any angle. Fits any car. Thousands are in use. In private cars-large and small-busses, taxis, ambulances and cabin boats. A style and voltage for every need Brush Nickel. the most popular model. S9.00 At your dealers or write KNAPP ELECTRIC CORPORATION Box :8 Port Chester, N. Y. Easy to Hang Pictures and to Hide the Ugly Wires Mounted and unmounted pictures, and even small framed ones, are easily displayed with Moore Push-Pins GlassHeads-Steel Points For larger pictures, mirrors, clocks, or any heavier wall decorations use Moore Push-less Hangers "The Hanger with the Twist" The fine tool-tempered steel points will not injure the finest woodwork or wall paper. 10c. Pkts. Everywhere Moore Push-Pin Co., Philadelphia, Pa. 1.L -L it is SO 1 easy i No SCRUBBING. No hard work. Simply sprinkle Sani-Flush into the toilet bowl follow directions on the can-and flush. Watch every mark, stain and incrustation disappear. Sani-Flush cleans and sanitizes the toilet bowl and hidden, unhealthful trap. It destroys all foul odors. There is nothing else that will do the same work. Harm less to plumbing connections. Keep it handy in the bathroom. Buy Sani-Flush at your grocery, drug or hardware store, or send 25c for a full-size can. Sani-Flush R.gUS Pa Orr Cleans Closet Bowls Without Scouring THE HYGIENIC PRODUCTS CO., Canton, Ohio For Vacation You'll ed , THE BOOK OF WILD FLOWERS By WIL,IAM JOSEPH SHOWALTER and Other Authorities 242 full-color portraits of flowers and plants by Mary E. E:aton, the world's leading fainter of flowers; 8 full-page color microphotographs of grasses by E. J. Geske; many monotint engravings; 250 pages. THE BOOK OF FISHES Game Fishes, Food Fishes, Shellfish and Curious Citizens of American Ocean Shores, Lakes and Rivers. By JOHN OLIVER LA GORCE and Other Authorities Illustrated with full-color portraits of 92 fisles in under-water action, painted by HIasline llurayania; 14 other engravings; 244 pages. Royal Octavo (o x 7 in.); Molloy-made art binding in brown, bronze and gold; $4 each, postpaid in U. S.; foreign mailing, 25 cts. Booklet in full color on request. Obtainable only from the NATIONAL GEOGRAPHIC SOCIETY WASHINGTON, D. C. B''