Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A clothes washer, or washer, is a machine designed to wash laundry, such as clothing, towels and sheets. The term is mostly applied only to machines that use water as the primary cleaning solution, as opposed to dry cleaning (which uses alternative cleaning fluids, and is performed by specialist businesses) or even ultrasonic cleaners.To clean clothing it is necessary to rub and flex the cloth to break apart solids and help the soap penetrate. At first this was done by pounding or rubbing the clothing with rocks in a river, and later developed into the corrugated wash board. In Roman times a person would whiten clothing by rubbing it against a rock while letting soap lay on it. The soap was made of animal fat.

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