Abstract
The Michigan State Department of Health made a survey of representative sections of the state in 1923 to determine (1) the incidence of goiter among school children and (2) the amount of iodine in the water supply of each section. Naturally the amount of iodine in the water supply is the best index to the food iodine found in that section. Early in 1924 a program of goiter prevention was outlined. This original program emphasized the importance of a complete resurvey of the same areas in ten years. The results of the first survey showed beyond a doubt that there is a correlation between a scarcity of food iodine and a high incidence of simple goiter. These data are given here only graphically to recall the areas examined, the incidence of goiter and the amount of iodine in the water supply (fig. 1). From this study it is apparent that
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