...Before boiling the water youcan carefully filter it if you like... 
Mary H. Kingsley 「Travels in West Africa」
...It was necessary to sterilize and clarify the "native" (unformolized)extracts; this was done by filtration through a Seitz filter...
William B. Stallcup 「Myology and Serology of the Avian Family Fringillidae」
...This fact indicates that the infectiousprinciple is not in solution, but is an organism withheld from the filtrate bythe filter...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...Thesolution in one bottle, the funnel is placed in the other, and the pictureheld over it; when the solution is poured on the plate, it runs from itinto the filter, and is always ready for use...
Samuel D. Humphrey 「American Handbook of the Daguerrotype」
...After standing a few hours, filter and evaporate again...
Samuel D. Humphrey 「American Handbook of the Daguerrotype」
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