274 Trans. Acad. Sci. of St. Louis. 
deafness. Although the returns did not seem sufficiently 
trustworthy for statistical treatment, they justified the state- 
ment that not a little deafness exists unknown to both teacher 
and parents. This hidden infirmity deprives the pupil of 
much of the benefit of class-room instruction. 
The measurement of the girth of chest over the garment 
next the skin was also modified after several thousand boys 
and girls had been measured, and the boys were made to re- 
move coats and vests while the girls were measured over the 
indoor dress. The few girls who wore stays laid them aside. 
