...Beginning September 8, the strong waste liquor from the scouring process has been applied to a filter containing 5 feet in depth of sand of an effective size of 0.25 millimeter. The rate of application has been equal to about 17,000 gallons per acre daily, and...

...effluent of Filter No. 12 A has been of most excellent quality (see page 493). The effluent of Filter No. 66 has been applied to Filter No. 67, containing 5 feet in depth of s:md of an effective size of 0.19 millimeter. The average rate of filtration obtained by this filter...

...clearly, for instance, by results obtained year after year with Filter No. 14. This filter contains 5 feet in depth of sand of an effective size of 0.19 millimeter, and to it has been applied, during the past four and one-half years, sewage which has first been strained...

...sewage partially strained and partially nitrified — were applied to Filter No. ISA, constructed of 5 feet in depth of sand of an effective size of 0.19 millimeter. This filter gave a highly purified effluent at a rate of nearly 1,000,000 gallons per acre daily for...

...of Effluent of Filter No. 19 A. Filtration following Coke Straining. Filter No. 14A, constructed of 5 feet in depth of sand of an effective size of 0.19 millimeter, was operated with the effluent of the coke strainer from June, 1894, until the end of the year 1899....

...November 25, — 322,000, 400,000, 370,000 and 350,000 gallons, respectively. Two small sand filters, each containing 5 feet in depth of sand of an effective size of 0.24 millimeter, were put into operation. The waste liquor resulting from the preparation of hides...

...[Paris per 100,000.] » Ran live days only. Filter No. 185, -nnjinj of an Acre in Area. This filter, containing 5 feet in depth of sand of an effective size of 0.23 millimeter, was in operation throughout 1902 and the first five months of 1903. It received during...