Chicago : Engineering and Contracting Pub. Co. · leaf 230
gust 23. 1911. ENGINEERING & CONTRACTING 215 they may be infected by and act as carriers ofthe germs of typhoid fever and possibly otherdiseases. During the four year period from 1!)00 to1903 when there were no restrictions upon thetaking of shellfish, the average typhoid feverdeath rate was… … -Bz- B,*± K,= 4 ^zls of Diameter 5ewer Fig 1. Recommended Circular Section forPlain Concrete Intercepting Sewers,New Bedford, Mass. rate fell to 5 per 100,000 in 1905, and 9 in1906. In the three following years the deathrate per 100,000 of population from typhoidincreased to 12, 23 and 21…
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