Haggerty : Study in Aritpimetic 



447 



brought together in Table XXXVI and are shown graphically in 

 the Form II charts, Figs. 17-30. 



The Form II charts show the variabilities of the several grades 

 in each of eighteen cities. Each column represents a city, the 



height of the column being proportional to the per cent of varia- 

 bility shown. The solid part of the column represents variability 

 in attempts; the open part of the column shows the variability 

 in rights. The average for the eighteen cities is shown by horizon- 

 tal lines across the chart. The figures on the left show per cents 

 In Table XXXVII the several cities are ranked as to the van- 



