This report is based on the reexamination of the girls in the public schools of Akron, Ohio, in grades from the fifth to the twelfth, inclusive, made from Nov. 26 to Dec. 3, 1918—nineteen months after beginning the prophylactic use of iodin. The first report1—a survey of the incidence of thyroid enlargements (goiter)— was based on the examination made in April, 1917. The second report2gave the results of the examination in November, 1917—seven months after beginning the prophylactic use of iodin. The same classification of the condition of the thyroid has been used as in previous examinations, namely: normal, slight, moderate and marked enlargements, adenomas and persistent thyroglossal tracts.3The pupils were further examined for gross manifestations of exophthalmic goiter and myxedema. No obvious case of either of these diseases was detected. ANALYSIS OF THE RECORDS OF NEW PUPILS The results of these examinations are