. Elements of agriculture, for use in schools. Agriculture. 246 ELEMETs'TS OF AGRICULTURE to cause all the surface water to run off. If too high, it is apt to wash. 229. Stone Roads.—However well graded and drained dirt roads may he, they are certain to hecome muddy in wet weather; and from the passing of many vehicles, are much cut up into holes and ruts. To avoid this, the surface of the road or track may be covered with some hard material, such as broken rock, gravel, or oyster shells, which does not become soft in wei weather. Broken rock is the material most generally employed, and v\'hen
. Elements of agriculture, for use in schools. Agriculture. 246 ELEMETs'TS OF AGRICULTURE to cause all the surface water to run off. If too high, it is apt to wash. 229. Stone Roads.—However well graded and drained dirt roads may he, they are certain to hecome muddy in wet weather; and from the passing of many vehicles, are much cut up into holes and ruts. To avoid this, the surface of the road or track may be covered with some hard material, such as broken rock, gravel, or oyster shells, which does not become soft in wei weather. Broken rock is the material most generally employed, and v\'hen properly used makes the most durable of all roads. There are two kinds of stone roads in general. Fig. 25.—Section of macadam road. Fig. 26. road. w7//7?//m7mm. Section of telford use. One was designed by a Scotchman named Macadam, and is called a macadam road, the other v/as designed by another Scotchman named Telford, and is called a telford road. 230. Macadam Roads.—The macadam road is built by using first a layer of broken rocks, none of the pieces to exceed three inches in diameter; the layer is rolled and packed. On this is placed another layer of smaller pieces of crushed rock, which is likewise rolled and packed. Lastly, a layer of finely crushed rock is put on, and, after being wet, is heavily rolled. 231. Telford Roads.—The telford road is somewhat similar to the macadam, except that in place of the first. 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 McBryde, James Bolton, 1866-1925. Richmond, B. F. Johnson Pub. Co.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectagricul, bookyear1901
