. A text book of elementary mechanics, for the use of colleges and schools. Fig. The wheel of a vehicle is useful in reducing frictionalresistance, as explained-in Art. 86; in overcoming ob-stacles in the road it acts as a continuous lever, hencethe advantage of a large wheel. 208.] WHEEL AND AXLE. 219

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmechanics, bookyear18