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 289
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… … 2737.
Mechanical engineering -- Dictionaries
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