National Geographic : 1923 Jun
How lead keeps the wolf from your door LEAD helps to protect you from famine. Even before the farmer plants his seed, lead is working to produce fertilizers. And each year your daily food supply grows more dependent upon the proper use of the fertilizers lead helps to make. Lead is also the farmer's assistant while crops are growing and fruit trees are bearing. Indeed, the farmer would be greatly handicapped without lead, and this loss would be felt throughout the world in inadequate food supplies. Enriching the soil Phosphates are the basis of nearly all artificial fertilizers. The phosphates mixed with sulphuric acid give one of the elements plant life needs. No lead enters into the fertilizer itself, but lead successfully resists the action of sulphuric acid. Hence it is used for lining the rooms and tanks in which the fertilizer-manufacturing processes are carried on, for making the pipes which convey the corrosive liquids, and for the pails and other containers used about the factory. Guarding fruit trees Lead aids the farmer in protecting his fruit trees, vines, and truck crops. He sprays them with arsenate of lead to poison insects that would otherwise destroy them. Lead in batteries The modern farmer's tractors, trucks, and auto mobiles depend largely on lead. A storage battery, mostly lead, provides electric current for the trac tor's ignition system and for the starting, lighting, and ignition of truck and automobile. Lead-tin solder seals gasoline tank and radiator. Litharge, d an oxide, is used in refining the -ousave $n-_l a gasoline that makes the tractor, O t truck, and automobile go. Painting with lead As paint, lead helps to protect the farmer's house, farm buildings, and equipment. Red-lead, an oxide of lead, makes a paint that guards the metal of his wind-mill and machinery against the attacks of rust and thus prolongs their usefulness indefinitely. White-lead is the paint usually used for wood and other non-metallic surfaces on farms and throughout the world. More property owners than ever before are learning the value of the phrase, "Save the surface and you save all." And they are saving the surface with white-lead or at least with paint containing a high percentage of white-lead. Look for the Dutch Boy NATIONAL LEAD COMPANY makes white-lead of the highest quality and sells it, mixed with pure lin seed oil, under the name and trade mark of Dutch Boy White-Lead. The figure of the Dutch Boy is reproduced on every keg of white lead and is a guarantee of excep tional purity. Dutch Boy products also include red-lead, linseed oil, flatting oil, babbitt metals, and solder. More about lead If you use lead, or think you might use it in any form, write to us for specific information. NATIONAL LEAD COMPANY New York. 111 Broadway; Boston, 131 State St.; Buffalo, 116 Oak St.; Chicago, 900 West 18th St.; Cincinnati, 659 Freeman Ave.; Cleveland. 820 West Superior Ave.; Pittsburgh, National Lead & Oil Co. of Pa., 316 Fourth Ave.; Philadelphia, John T. Lewis & Bros. Co., 437 Chestnut St.; St. Louis, 722 Chestnut St.; San Francisco, 485 California St.