ix.] THE ARTISTIC FACULTY. 161 



value in the form of {(P + l*4)-0-36}, or {G - 0-36}. 

 Table 8 shows that the Deviation of— 0'36 is found 

 at the Grade of 40°. Consequently 40 per cent, of 

 this Co-Fraternity will be Non- Artistic and 60 per cent, 

 will be Artistic. Observation Table 23 shows the 

 numbers to be 36 and 64, which is a very happy 

 agreement. 



Next as regards the Non-Artistic Parents. The Non- 

 Artistic portion of the Population occupy the 70 first 

 Grades in the Art-Scheme, and may be divided into 

 two groups ; one consisting of 40 Grades, and standing 

 between the Grades of 70° and 30°, or between the 

 Grade of 50° and 20 Grades on either side of it, the 

 average Art-measure of whom is P ; the other group 

 standing below 30°, whose average measure maybe taken 

 to be P — 1*71, for the same reason that the group 

 above 70° was taken as P + 1*71. Consequently the 

 average measure of the entire Non-Artistic class is 

 Jo {(40 x P) + 30 (P - 1-71)} 

 = P - f£ x 1-71 = P - 0-73. 

 Supposing Mid-Parents of this measure, to represent the 

 entire Non- Artistic group, their offspring will be a Co- 

 Fraternity having for their M the value of P — {§ x 0*73} 

 or P — 0*49, which we' will call C, and for their Q the 

 value of 0*88 as before. 



Such among them as exceed {P — 0"78], which we 

 may write in the form of {(P — 0'49) + (1 '27)}, or 

 {C + 1*27}, are Artistic, and they are those who, 

 according to Table 8, rank higher than the Grade 83°. 

 In other words, 83 per cent, -of the children of Non- 



M 



