. The American encyclopædia of commerce, manufactures, commercial law, and finance. losed ^_^ between two slabs cementedin the case. The upper(glazed earthenware) slabhiis a central aperture withraised border, and a smallperforated basm immedi-ately below it; into this isinserttxi a sponge to grosser impurities,whichis taken out and cleaned atshort intervals. The filteredwater passes through thelower (and porous) slab tothe reservoir below, whichcommunicates above witiithe outer air by a narrowtube passing up within tothe top of the apparatus,and delivers its waterthrough a tap —Cha
. The American encyclopædia of commerce, manufactures, commercial law, and finance. losed ^_^ between two slabs cementedin the case. The upper(glazed earthenware) slabhiis a central aperture withraised border, and a smallperforated basm immedi-ately below it; into this isinserttxi a sponge to grosser impurities,whichis taken out and cleaned atshort intervals. The filteredwater passes through thelower (and porous) slab tothe reservoir below, whichcommunicates above witiithe outer air by a narrowtube passing up within tothe top of the apparatus,and delivers its waterthrough a tap —Charcoalin the form of solid finelyporous blocks, which can ^be conveniently brushed andclianed externally, is now often moulded for filters Fig. KT, - UtCAMta FiltejThe convenient decanter fil-ter, iu whicli the water passes through the block to a centtube (Fig 177), forms an elegant addition to the .siUfbonSouietimts thf block is fitted in a movable pan. Ag:iin, In Ifilter shown in 1, Fig. 173, a double F is etfected. the \g first through loose charcoal, U, then through a chi. al bl shown Th. k; u i. Ill this without . ..?.i;,; I ; >? mov-able and plate. A, which isplaced above the charcoal(:i, Fig. 17S), allows of easyrenewal of the latter. Thecharcoal used in these fil-ters is chiefly of vegetableorigin. They are found to
Size: 1222px × 2045px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookpublisherbostonesteslauriat
