ound of vibratory motion of the parti- scraper for moving dirt from one locality to another and for subject, warrant us in the following conclusions, namely: leveling and grading. It is mounted on wheels and is pro cles of the bar, because the motion of the bar at its middle 1st. That the fact of… … not tointerfere with the vibra- secured to the side of the tion, and the bar made to vi- scraper, and is engaged by an- brate longitudinally by strik- other toothed sector, 8, pivot- ing on the end with a mallet. The coil was placed directly at the middle and also shifted to right and left, but the…
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