. Effective farming; a text-book for American schools. Agriculture. 458 Effective Farming the screens, dust and chaff are blown away by an air blast from a fan. The straw passes over racks to the stacker. 230. Farm tractors. — A statement about farm machinery would be incomplete without mention of the modern farm trac- tor. In recent years, these machines have • been much per- fected and are now used on many farms. For the most part they are operated by gas engines, some form of petroleum being the fuel employed. Many of them burn kerosene and gasolene mixed; others burn only gasolene. Tractor
. Effective farming; a text-book for American schools. Agriculture. 458 Effective Farming the screens, dust and chaff are blown away by an air blast from a fan. The straw passes over racks to the stacker. 230. Farm tractors. — A statement about farm machinery would be incomplete without mention of the modern farm trac- tor. In recent years, these machines have • been much per- fected and are now used on many farms. For the most part they are operated by gas engines, some form of petroleum being the fuel employed. Many of them burn kerosene and gasolene mixed; others burn only gasolene. Tractors can be secured in a variety of sizes, from those that can pull, one or two plows to those capable of pulling a dozen or more (Fig. 196). The. Fig. 209. — A tractor pulling six seeders. machines have many uses. In tillage work, they often haul plows and harrows at one operation. For planting, they can be arranged to haul a number of seeders (Fig. 209). For harvesting, they can be attached to a hay-loader (Fig. 59) or to several mowers (Fig. 56), or to binders (Fig. 49), and a wide swath can then be handled in one trip across the field. They are useful not only for pulling loads, but the engines can also be used to pump water, run the thresher (Fig. 210), saw wood, and the like. Tractors are made in two general styles, those with high wheels and those with a creeping tread. The latter are especially useful on muck ground. In price the tractors vary from a few hundred dollars to about $2500, the price being governed by the size and power of the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Sampson, Harry Oscar, 1879-. New York, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
