Title: American homes and gardens
Year: 1905 (1900s)
Subjects: Architecture, Domestic Landscape gardening
Publisher: New York : Munn and Co
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library
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his intermittent method has the advantage of being verysimple and requiring no machinery, but the output per squarefoot of surface is still rather small. To increase it attemptshave been made to make the flow continuous without sup-pressing the indispensable aeration of the beds. This resultis obtained by employing pressure sprayers, hydraulic tourni-quets, inverting droppers or intermittentsiphons. The bacterial beds are made six orseven feet thick, and complete purifica-tion is obtained with a single bed. Inthe first system the water falls con-tinuously, in a fine rain, upon the slagfrom spraying nozzles distributed overthe surface of the bed, through which itpercolates slowly and emerges in a puri-fied condition at the bottom. The appa-ratus is costly and is frequently clogged,but the purification is perfect and the out-put exceeds three cubic feet per squarefoot per day. The hydraulic tourniquets or rotarysprinklers are based on the same prin-ciple. The whole surface of the bed is
Text Appearing After Image:
Flooding a Bacterial Bed of First Contact at La Madeleine-les-LillePart of Second Contact Bed Is Shown at Right sprinkled by a single central apparatus with two or fourhollow and perforated arms. In this system also the purifi-cation is perfect, and the output is nearly four cubic feet persquare foot per day. But here, too, the apparatus is ex-pensive and liable to stoppages. Besides, it is often disturbedby the wind. The inverting droppers usually consist of a wheel carryingbuckets which empty themselves on the bed. The wheelautomatically moves forward at each emptying and so theentire bed is watered. One of the best devices of this classis Fiddians rotary distributor, which gives results as goodas those obtained with sprinklers and works with muchgreater regularity. Finally, the intermittent siphons devised by Dr. Calmetteare simply siphons which fill automatically at the expiration 314 AMERICAN HOMES AND GARDENS August, 1907 of a variable period of time and suddenly discharge defin
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Tagged: , bookid:americanhomesgar41907newy , bookyear:1905 , bookdecade:1900 , bookcentury:1900 , booksubject:Architecture__Domestic , booksubject:Landscape_gardening , bookpublisher:New_York___Munn_and_Co , bookcontributor:Smithsonian_Libraries , booksponsor:Biodiversity_Heritage_Library , bookleafnumber:492 , bookcollection:biodiversity , BHL Collection , BHL Consortium