38 The Endocrine Organs 



Direct proof of hypersecretion of the thyroid is thought to be furnished 



Fig. 26. — Section of thyroid from a case of exophthalmic goitre. Magnified 75 diameters. 





m 





Fig. 27. — Part of the same section, magnified 200 diameters. Notice the irregularity in size 

 and shape of the vesicles, and the fact that they are mostly empty of coagulated colloid. 



by the experiments of Reid Hunt, who found that the blood of a person 

 afflicted with exophthalmic goitre increases the resistance of mice to the 



