30 GLANDS IN HEALTH AND DISEASE 



Becently (June, 1920) they published results of 

 studies which covered a period of some thirty 

 months. Of 2,190 pupils that had received the 

 sodium iodide treatment, five had shown enlarge- 

 ment of the thyroid, while of 2,305 pupils who had 

 not received any such treatment, 495 showed an 

 enlarged thyroid. 



In a later article (Oct. 1, 1921) they write: "Of 

 1,182 pupils with thyroid enlargement at the first 

 examination who took the prophylactic, 773 thy- 

 roids have decreased in size ; while of 1,048 pupils 

 with thyroid enlargement at the first examination 

 who did not take the prophylactic, 145 have de- 

 creased in size. . . Klinger has recently (1921) 

 reported even more striking curative results in the 

 school children of the Zurich district. He worked 

 with school populations in which the incidents of 

 goiter varied from 82 to 95 per cent., while our 

 maximum incidence in Akron was 56 per cent. 

 With such a high natural incidence of goiter, his 

 observations naturally deal more with the curative 

 effects. Thus of 760 children, 90 per cent, were 

 goitrous at the first examination. After fifteen 

 months' treatment with iodine, only 28.3 per cent, 

 were goitrous, of a total of 643 children re-ex- 

 amined." 



Hypersecretion. An excessive secretion (hy- 

 persecretion) developed by the thyroid gland may 

 give rise to the disease commonly known as "ex- 



