Canadian engineer . n each row of piers anopening with an adjustable door will allow the heated air topass into the filter. On each side of the gallery and in the arch of the filterroof a similar duct takes the air back to the fan. Electric radiators are also provided in the lower part ofthe gallery to prevent the freezing of gauge and controllerpiping. Figures 3, 4 and 5 give many details of the design of thefinal filters. 194 THE CANADIAN ENGINEER Volume 22. Contract No. 3—Prefilters and Filtered Water Reservoir— The prefilters and filtered water reservoir are to be built just west of the fi
Canadian engineer . n each row of piers anopening with an adjustable door will allow the heated air topass into the filter. On each side of the gallery and in the arch of the filterroof a similar duct takes the air back to the fan. Electric radiators are also provided in the lower part ofthe gallery to prevent the freezing of gauge and controllerpiping. Figures 3, 4 and 5 give many details of the design of thefinal filters. 194 THE CANADIAN ENGINEER Volume 22. Contract No. 3—Prefilters and Filtered Water Reservoir— The prefilters and filtered water reservoir are to be built just west of the final filters, and between them and the aqueduct. The filtered water reservoir is of concrete, with groined arches for the roof and inverted g-roined arches for the floor. ed on each side of the operating gallery, which is practically acontinuation of the gallery of the final filters. The floors of the prefilters are carried by a second seriesof groined arches, 8 feet above the roof of the filtered n o D 0 a a a a , a . a a
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishertoron, bookyear1893
