Show D ingers ol 01 I 1 liters filters for I 1 water are of many kin lin la Is in then their I 1 tut ut according to the report of the maryland state bearl of health it appear iott such filters may lily loae 1 efficiency 1 until they bec me tint claas culture beds for bacteria lac teria in en e idenie of this po position an ex adlle citi cited is thit f if f a man in Balti baltimore inore who ho souls sen Is the whole mater w ater cupply ay of ins his house hoube through a large filter an I 1 suase ineptly puts his ilia drinking vs ater through one ot of the small domes tn com ni tit IT in the market k tet te t of this arrangement show shoved id th abit it n u a lay N when hen the city taps tape N were ere r inning 51 0 bacsena to fl 0 a cubic cen en t met er tl a I 1 arge irge filter m a as belive delivering linw 9 fl 9 salo bacteria in irk the game same water N ater when the lare filter was repacks only 9 bacteria tena per centime centini oter got through it th ough this same nater ater vai n I 1 lasted aed through ta tie a small f fitro iter ame 0 it A with ith 71 bacteria per centi 11 lit 4 j ahli pat ot ol 01 the li matter la is still f nr ther by another example a diw wl wi ere a filter suppo supposed ged to be the b t in the ilia market nas in wae a the effectiveness of tile tl is filter w as so hed th tit it the precaution aution was of lolling boiling the NN ater titer after it N as filtered fil terel |