. The Popular science monthly . Thecities—90 in number—having a popula-tion of 50,000 to 250,000 show thelargest percentage of increase, namely,.41 per cent. In New England and theAtlantic states about three quarters ofthe people live in the cities. THE ERADICATION OF HOOK-TV OEM DISEASE The second annual report of theRockefeller Sanitary Commission tellsthe story of a dramatic achievement ofmodern sanitary medicine. It will beremembered that the existence of hook-worm disease in the south was not sus-pected until recently. It has now beenfound to be extremely prevalent. Inthe infection survey
. The Popular science monthly . Thecities—90 in number—having a popula-tion of 50,000 to 250,000 show thelargest percentage of increase, namely,.41 per cent. In New England and theAtlantic states about three quarters ofthe people live in the cities. THE ERADICATION OF HOOK-TV OEM DISEASE The second annual report of theRockefeller Sanitary Commission tellsthe story of a dramatic achievement ofmodern sanitary medicine. It will beremembered that the existence of hook-worm disease in the south was not sus-pected until recently. It has now beenfound to be extremely prevalent. Inthe infection survey of the commission87 counties were covered, 37,267 chil-dren examined, and the percentage ofinfection by counties was found torange from to per cent. Insome schools practically every child wasinfected, and a large percentage of allchildren were unable to attend disease is particularly disastrousin its consequences, for though not or-dinarily fatal, like malaria it prevents 206 THE POPULAR SCIENCE M0N1HLY. Dispensary group at public school building, Fairmon, Robison County, N. C,July, 1911. Treated at the place on that day, 187. the individual from doing his ordinarywork, reducing, it is said, his efficiencyto less than half. A good part of theinefficiency, laziness and lack of enter-prise of the white people of the southis attributable to the infection. It isfurther a disease which is both curableand preventable, and it is in such acase that medicine and hygiene havetheir great opportunity. Some 75,000 persons were treated atthe initiative of the commission, andmuch was accomplished by spreadingknowledge as to the means of prevent-ing soil pollution. Indirectly the com-mission has had the effect of awakeninginterest in health conditions throughoutthe south, so that state boards of healthhave become more active, and superin-tendents of health giving their wholetime to the work have been appointedin various counties. The commissionhas also undertaken to ob
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