WATKft FM>OR WEAK TANK N2 I N9 3 * ?w^^^ V////////////////////////////A PLOO FUOOR qV, TANK £1^ It To "D re, i < To Pol-c.her6 TU FIG. 9.—ARRANGEMENT OF BI.HACK-MIXING PLANT, USING BLEACHING POWDER There are three mixers, fourth wash tank, etc.