Document DoMmr4QNwNma6zeBy16x42VB

VOLUME XLTV ER FIVE Th eNATIONAL GEOGRAPHIC MAGAZINE NOVEMBER, 1923 CONTENTS TWENTY-FOUR PAGES IN FULL COLOR The Story of the Horse The Development of Man's Companion in War Camp, on Farm, in the Marts of Trade, and in the Field of Sports With 60 Illustrations WILLIAM HARDING CARTER MAJOR GENERAL. U.S. A. Horses of the World EDWARD HERBERT MINER 24 Paiadnc* in Oil Reproduced in Full Color PUBLISHED BY THE NATIONAL GEOGRAPHIC SOCIETY \ HUBBARD MEMORIAL HALL Wa s h in g t o n , d .c . c o py I \ Lead helps to guard your health YOU wouldn't live today in a house without an portant ingredients in making the glossy white adequate plumbing system. Tor without mod* enamel covering the iron bodies of tub and basin rrn plumoing, sickness might endanger your life. and the glazed tile walls. Lead concealed in the walls and under the floors of many modern buildings helps to give the best Lead in paint sanitation. While lead is invaluabte in assuring comfort Lead pipe centuries old and proper sanitation, its best-known and most Lead, therefore, is contributing to the health, comfort, and convenience of people today as it did when Rome was a center of civilization. Lead water and drainage pipes more than 1100 years old have been found in exactly the condition they were in when laid. In some cities today the law specifies that lead pipe alone may be used to bring water from street mains into the building. In drainage systems are lead traps made of lead pipe bent into the lhape of the letter $, so that a little water wilt stay in the bend and prevent gases which collect in the pipe from getting out through the house. widespread use is as white-lead in paint. Such materials as wood would soon deteriorate unless protected with paint. And the paints that give (he most thorough protection against the weather are based on white-lead. The loss of invested capital through failure to protect the surface of property adequately has led property owners to paint frequently and well. As days and months go by, more and more of them are learning the wisdom of the phrase. "Save the surface and you save alL" And they are using white-lead paint to prolong the lives of their houses. Look for the Dutch Boy The malleability of lead also makes it easy to Na t io n a l Le a d Co mp a n y makes change the direction of any pipe through the use white-lead and sells it mixed with of lead bends. pure linseed oil. under the name Joining the pipes and trade-mark of Dutch Bay A plumber easily "wipes" a joint or repairs a pipe leak with lead and tin solder. Because this alloy melts at the low temperature of 351 degrees it can be applied without melting the lead pipe, which melts at 620 degrees. Lead is also poured into the Aanges of pipe* joints to make them absolutely tight. Pipe threads aahitt-ltnd. The figure of the Dutch Boy is reproduced on every keg and is a guarantee of excep tional purity. Dutch Boy products also include red-lead, linseed oil. flatting oil, babbitt metals and solder. are painted with white*!ead or red-lead to moke a tight connection. Where vibration or movement of pipes may loosen a poured joint, lead wool is More about lead If you use lead, or think you might use it in any used; lead shredded into threads is packed into form, write to us for specific information. the joint in a dense, compact mass. Rubber gaskets and ball wash NATIONAL LEAD COMPANY ers containing lead prevent leaking at joints and faucets. Lead is used to beautify the modern bathroom. Red*lead and litharge, both lead oxides, are im New Ywk. Ill tnunn Sin. Ill s Set iafaia. 110 Oak See Ckicaea. MO Weat lit* Sl i Ciaoaaao. 619 Flxau An.1 Ckmui. 120 Wnt Svaenor An. i Sc Lavia. 722 Ckcnaai Sc Saa Fiuam. All Caliton>a $ci PmskatrS. Kanaaal Laa4 A Oil Ca. al Pa.. 116 Fwa Arc. i PkilaSclakia. jaka T. Leva 4 Sim. Ca-- 417 Ckisvf Sc