1381 
TABLE VIII. 
Boys | Girls 
Age (years) a 
Quick | Fairly quick | Slow | Quick | Fairly quick | Slow 
8—9 28 29 30 — 28 En ie. 
Me 9 3 | 4 — 19 36 
10—11 20 sone 19 si 12 11 
11—12 28 20 aie — A 44 31 
Degen, | et) 50% - - oo | 88% 
largest among the girls; it progresses with the speed of working. 
For the quick, and the fairly quick workers among the boys and 
for the fairly quick, and the slow workers among the girls it 
amounts resp. to 62°/,, 59°/,, 70°/, and 58°/,. 
In Tables IX and X the data of the other tables are specified. 
Table IX contains for the hoys and the girls separately and for the 
two sexes collectively the percentage of children of each of the three 
categories, that actually made from O—-10°/,, from 11—20°/,, from 
21—30°/,, from 31—40°/, and from 41—50*/, of all the mistakes 
that could be made. 
In arranging the data for this table we considered as mistakes 
the letters which should have been struck out and were skipped; 
letters that were crossed mistakenly were left out of consideration. 
We could readily do so because the latter are by far fewer in 
number than the former. In fact they might have been left out of 
consideration in all our calculations without interfering with the 
accuracy of the experimental data. The scarcity of percentages in 
the columns 31—40°/, and 41—50°/, is due to the fact that the 
groups concerned did not yield enough cases of the percentages 
under consideration to be worked out mathematically. 
Table X gives for boys and girls separately in percentages the 
increase of the percentage of children that made from 0—-10 °/, and 
from 11—20°/, of the possible number of mistakes. As mistakes 
were considered, just as in table IX letters that should have been 
struck out but were skipped. No calculations were made from the 
