An Up-to-Date Rapid-Sand Filter Plant
New Cambridge, Mass., System Described by Engineer Who Designed It—Discussion by Those Who Took Part in the Work and Others
THE new Cambridge filtration system is notable, not only as an example of the last word in rapid sand plants, but also in the fact that it is the first municipal plant of this type of filter to be installed in the commonwealth of Massachusetts. The following description by those most closely identified in the work of designing and installing the system will be found of especial interest: Twenty-one years ago the first rapid sand filter plant wherein the filter tank units were built of concrete, rectangular in plan, and where the design of the entire works revoluntionized the art of rapid sand filter construction, was placed in operation at Little Falls, N. J. This splendid plant set the pace for all fuCol. George A. Johnson tUTe construction of
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