240 Trans. Acad. Sci. of St. Louis. 
on a level with the nipples at full inspiration to the girth at 
full expiration and dividing by 2, the measurement being 
made over the boys’ shirts and the girls’ dresses, the corsets 
occasionally worn by American school girls being previously 
removed. The manner of making the measurements is fully 
described in the author’s work On the Growth of St. Louis 
Children, about to be published by the Academy of Science of 
St. Louis. 
The Absolute Probable Deviation from the Average is 
given in Table No. 3, extracted from Tables No. 6, 
and 8. The total deviation of the five dimensions meas- 
