. Town and city. 24 TOWN AND CITY They saw that Lowell and Lawrence always hadsewage in their drinking water, but that they only hadtyphoid fever when there was typhoid fever in the citiesabove them. They also saw that there was no possibleway to tell by the color or the taste, or the general looksof any water whether there were disease microbes in it or not, and they promptlydecided that the only wayto be safe was to be ridof every possible microbeand drink only the purestwater. Now this was moreeasily said than done, forthe question was how toget the purest water forevery city. There wasClev
. Town and city. 24 TOWN AND CITY They saw that Lowell and Lawrence always hadsewage in their drinking water, but that they only hadtyphoid fever when there was typhoid fever in the citiesabove them. They also saw that there was no possibleway to tell by the color or the taste, or the general looksof any water whether there were disease microbes in it or not, and they promptlydecided that the only wayto be safe was to be ridof every possible microbeand drink only the purestwater. Now this was moreeasily said than done, forthe question was how toget the purest water forevery city. There wasCleveland, for example,who gave herself typhoidfever by carrying her own microbes round and roundin a circle through her drinking water and her there was Lawrence that took typhoid microbesfrom other cities. Yet Cleveland must keep on usinglake water, and Lawrence must take hers from a they needed was some way of changing the char-acter of the water in both places. The question washow to do Typhoid Microbes To study l\ie Jiagella on them see GoodHealth, page 30 CHAPTER XVI PURIFICATION OF WATER AND SEWAGE The State Board of Health now advised Lawrence toput in large out-of-door filters, as London and Berlinhad done. They said it was the only thing to do. Indeed, theyknew from experiments which they themselves had madejust how helpful such filters may be. This settled thecase for Lawrence. The city now borrowed thousands of dollars, engagedmany workmen, accepted plans which Mr. Mills hadmade free of charge, and proceeded to make huge sandfilters which covered two and a half acres of ground. As the work went on everybody was interested. Itcertainly did not look as if such filters could do anyparticular good, for they were made simply of layers ofgravel and of coarse and fine sand, with pipes under-neath. The water was to go from the river to the surfaceof the filters, and from there it was to soak through thesand and be carried in pipes to all parts of the
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