Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 768
ease and certainty with which they canbe operated and the Filter-bed perfectly cleansed. All Filters of the Pressure type are in-closed in a heavy steel case tested to 150 lbs.pressure for ordinary conditions. Whendealing with very high pressures thestrength of the case is proportionally… … i5fC TION/IL i/irt^ firoNT Eleti/ation. HUNS-£f?FOFfn-£LFffCrH Pff£CS.nLr£/f. The Filter-beds are composed of a spe-cially prepared and indestructible Silica,and whatever other material the special case in hand may require. As we build all our Filters to suit each particular case, you aresure of…
Building materials
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