OF ATTRIBUTES IN STATISTICS. 



309 



Change of Association with Age. 



62. I gather from Table XXV. of the Report that the average age of the 

 " Infants " would be three or four years, Standards I. -III. about seven years, and 

 Standards IV.-Ex. VII. eleven or twelve. It is unsatisfactory not having a clear 

 classification of the children by age pure and simple, as a classification of Standards 

 must imply an uncertain amount of selection by mental capacity. 



It is a curious point that Standards I. -III. exhibit a higher percentage of defects, 

 with the exception of cases of low nutrition, than either the " Infants " or Standards 

 IV.-Ex. VII. The percentages are given in full for each separate Standard in 

 Table VI. below, and in every defect there is a rise in frequency on passing from the 



TABLE VI. Showing the percentages of Children with given Defects and with any 

 Defect in the different Standards. (1892-94 investigation.) 



A. Development Defects. B. Nerve Signs. C. Low Nutrition. D. Mental Dulness. 



" All ages " includes those in Standard and in no Standard. 



group of " Infants " to Standard I. in most cases a considerable rise, the percentages 

 of nerve signs more than doubling, and the percentages of development defects for 



an apparently negative association between " suppuration " and " low nutrition " in the case of boys of 

 poor physique. Dr. Sm I.HHAM also states that the late Mr. H. JONES, for many years Superintendent of 

 the boys at Bisley, noticed the fact that those boys who did not take green vegetables with their food 

 suffered from night-blindness, which ceased when he insisted on their taking green food regularly for some 

 weeks. This suggests that further inquiry as to nutrition and eyesight might be of a good deal of interest 



