The Jewell Gravity Filter.

Issue 22 and Volume 1891 10.

The Jewell Gravity Filter. Among the several systems in use for the mechanical filtraion of water is that known as the Jewell Gravity Filter, illustrated herewith, which, while it has been before the public for comparatively few years, has been quite extensively adopted, especially where large quantities of water were to be treated, as in public water-works systems, paper mills, and other large manufacturing establishments. The tanks of these filters are made of cypress wood, for which material the advantages are claimed that it is practically indestructible in water, is less expensive than steel, and, as the tank can be shipped to its destination “knocked down,” will facilitate the erection of the latter in places where it would be a difficult task to put up one of metal. Among the claims in favor of the general character and operation of the device are that most of the impurities are restained…

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