. Farm implements, and the principles of their construction and use; an elementary and familiar treatise on mechanics, and on natural philosophy generally, as applied to the ordinary practices of agriculture ... Croskills Archimedean Root-washer. be washed are first delivered into a hopper, from which 198 HYDRODYNAMICS. they pass into an inclined cylinder made of strips ofwood with grate-like openings. The cylinder has twoportions separated by a partition, in the first of whichthey remain while the handle is turned for washingthem. As soon as the washing is finished, the motionof the handle is
. Farm implements, and the principles of their construction and use; an elementary and familiar treatise on mechanics, and on natural philosophy generally, as applied to the ordinary practices of agriculture ... Croskills Archimedean Root-washer. be washed are first delivered into a hopper, from which 198 HYDRODYNAMICS. they pass into an inclined cylinder made of strips ofwood with grate-like openings. The cylinder has twoportions separated by a partition, in the first of whichthey remain while the handle is turned for washingthem. As soon as the washing is finished, the motionof the handle is reversed, which throws them into theother part, which has a spiral partition, along whichthey pass till they drop into a spout outside. The same principle is adopted in the horizontal corn-sheller, shown by the annexed figure {Fig. 167), al- Fig. though this machine has no connection with hydraul-ics. The corn in the ear is thrown into the hopper atone end, and is quickly separated from the cob by rowsof teeth revolving in a concave bed and set spirally,which, by this arrangement, carry along the cobs andeject them from the other end. This is a good corn-shelling machine for horse-power. The sausage-mincing machine operates on a similarprinciple. PUMPS. Great improvement has been made in the commonpump for farms within the past ten years. The bestcast-iron pumps, made almost wholly of this metal, far PUMPS. 199 rig-168. exceed in durability and ease of working those formerly con-structed of wood, and excel allothers in cheapness. Fig. 168exhibits the working of the com-mon pump, the water first pass-ing through the fixed valve be-low, and then through the onein the piston; both opening up-ward, it can not flow back with-out instantly shutting water is driven up by thepressure of the atmosphere, ex-plained in the next
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Keywords: ., bookcentury1800, bookdecade1850, bookpublishernewyo, bookyear1854
