Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 288
tight casewith a raised edge in whichare placed the bearings onthe handle. The wash-boardis attached to the dependingarm of the lever in such a way that the latter is easily moved. The clothes are placed in the case,and by moving the lever up and down as in pumping they are thoroughly rubbed,… … 276 LAUNDRY MACHINERY. To wash any fabric properly, it is of the utmost importance that the water be pure. Many exten-sive laundries have found it necessary to build large charcoal and gravel filters in order to render thewater fit for use. Water that is very hard, containing large quantities of…
Mechanical engineering -- Dictionaries
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