Quotation from: General Science

Written by: Bertha M. Clark


Evaporation is a slow process occurring at all times; it is hastened
during the summer, because of the large amount of heat present in the
atmosphere. Many large cities make use of the cooling effect of
evaporation to lower the temperature of the air in summer; streets are
sprinkled not only to lay the dust, but in order that the surrounding
air may be cooled by the evaporation of the water.


Some thrifty housewives economize by utilizing the cooling effects of
evaporation. Butter, cheese, and other foods sensitive to heat are
placed in porous vessels wrapped in wet cloths. Rapid evaporation of
the water from the wet cloths keeps the contents of the jars cool, and
that without expense other than the muscular energy needed for wetting
the cloths frequently.

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