338 Trans. Acad. Sci. of St. Louis. 
Further evidence is afforded by Table No. 37, in which the 
daughters of professional men are divided into two equal 
groups, in the manner explained on page 177 of The Physical 
Basis of Precocity and Dullness, one group containing the 
fifty per cent who are found in the upper grades, the other 
the fifty per cent found in the lower grades. It should be 
TABLE No. 37. 
MEDIAN WEIGHT OF THE DAUGHTERS OF PROFESSIONAL MEN DISTRIB- 
UTED BY SCHOOL GRADE. 
ah ER a e S31 o-B 
~ Ss - ; : Ss .j~ a 
ae Slee g ge 8ises Hp alaos 
rE 238 School Grades. aue Se School Grades. | o 8 2s 
<25|52> oo. 51S! 9 Boe \eg5 
m\5° a5 Fe aS | ZO a 
od Nea 
7 | 60 |Kg., 101. 20.29 | 20.81 |90 I, IL. 50 7 
8 | 52.5 Kz. 97 I. 22.13 | 23.75 |3 I, I, III. 2.5) 8 
9 53.5 |I, 69 IT. 24,52 | 25.07 |31 I, INI, IV, V 58.5 9 
10 57.5 L IT, 48 IT. 27.19 | 27.64 [52 III, 1V, V, VI.| 57.5 10 
Il 58.0 ? II, Ill, 28- IV. | 28.76 | 31.27 |72 1V, V; VI, VII.| 58.0 ll 
12 50 LIL, UL 81 IV. 83.65 | 34.05 |19 IV, V, VI, VII.| 50 12 
13 55.5 Ii, page IV, 78 V.' 88.46 | 39.55 122 V,VI,VII, VIII.| 55.5 13 
remarked that this method of division diminishes the con- 
spicuousness of the difference between lower and _ higher 
grades by not presenting the weights for outlying grades, but 
for a small number of observations it is much more reliable 
than the method of which Table No. 86 is an illustration. 
The results of this study of the weights of girls from 
the same social class distributed by school grade contirm the 
conclusion reached in the publications cited above, namely 
that successful pupils are larger than the unsuccessful. 
