268 
Folkmar—The Duration of School Attendance. 
Conclusions as to Minimum Limit. — There can be no doubt, 
therefore, that at least the following per cents dropped out at 
the grades named: 1 
27 per cent, by the end of the first grade. 
43 per cent, by the end of the second grade. 
58 per cent, by the end of the third grade. 
71 per cent, by the end of the fourth grade. 
82 per cent, by the end of the fifth grade. 
89 per cent, by the end of the sixth grade. 
93 per cent, by the end of the seventh grade. 
96 per cent, by the end of the eighth grade. 
98 per cent, by the end of the ninth grade. 
99 per cent, by the end of the tenth grade. 
99.6 per cent, by the end of the eleventh grade. 
100 per cent, by the end of the twelfth grade. 
This is our minimum limit. 
INDUCTIVE METHOD. 
Let us now take up the second general method of the paper, the 
inductive or class method. The difficulty in following a particular 
class from grade to grade in these statistics is due to the in¬ 
crease of population through immigration. Many children on 
coming from other cities to Chicago, enter the higher grades, 
thus increasing the apparent number of the real class that en¬ 
tered in the first grade. The first thing necessary, therefore, is 
to make population-corrections in the class enrollment. 
Corrections for Increase of Population. — The next three tables 2 
will make clear the method used in ascertaining the corrections 
to be applied to the printed enrollment (Table XIII). Table X 
gives the official biennial census. The figures for the alternate 
years can easily be estimated by inspection, for the increase is 
found to follow a regular law. It is, for several years after 1880, 
1 Table IX, True or Entrance Enrollment (Chicago), p. 290; also 
Table XXIII, Final Conclusions as to Per Cents that Drop Out , 
page 301. 
2 Table X, Method of Obtaining Population Corrections , p. 291; Table 
XI., Population Corrections , p. 292; Table XII, Estimated Per Cents 
of Increase of Population, p. 293. 
