. Bulletin of the Department of Agriculture. Agriculture; Agriculture. EARTH, SAND-CLAY, AND GRAVEL ROADS. 25 Middle West, and the average rate of grading with a grading machine is, therefore, much less than one-fourth mile of road per day. USE OF ELEVATING GEADEE. Figure 14 shows an elevating grader at work. The essential features of this machine are a plow with a heavy moldboard, an elevating belt, a suitable frame for supporting the plow and belt, and driving and adjusting mechanisms for operating the belt and con- trolling the work. The plow loosens the material and throws it onto the
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. EARTH, SAND-CLAY, AND GRAVEL ROADS. 25 Middle West, and the average rate of grading with a grading machine is, therefore, much less than one-fourth mile of road per day. USE OF ELEVATING GEADEE. Figure 14 shows an elevating grader at work. The essential features of this machine are a plow with a heavy moldboard, an elevating belt, a suitable frame for supporting the plow and belt, and driving and adjusting mechanisms for operating the belt and con- trolling the work. The plow loosens the material and throws it onto the belt, which conveys and deposits it either in the roadbed or wagons. Elevating graders are adapted especially to building up embank- ments with material excavated from shallow borrow ditches along. Fig. 14.—Elevating grader at work. each side of the road. They also may be used to advantage in excavating long, shallow, through cuts and loading the material thus excavated into wagons for use in building up embankments at other points. The latter use, however, is restricted to situations where there is sufficient space to operate the grader and at the same time afford passageway for the teams and wagons to follow under the end of the belt to receive the successive loads as the grader is drawn forward. It is customary to employ a traction engine for operating the ele- vating grader, though teams are used sometimes. Ordinarily, the machine may be operated successfully either with a 25-horsepower tractor or with 12 well-trained horses. A well-constructed elevating grader, adapted to either horse or tractor power, may be purchased at an average price of about $ 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 United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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