162 NATURAL INHERITANCE. [CHAP. 



Artistic parents will be Non-Artistic, and the re- 

 mainder of 17 per cent, will be Artistic. Observation 

 gives the values of 79 and 21, which is a very fair 

 coincidence. 



When one parent is Artistic and the other Not, their 

 joint hereditary influence would be the average of the 

 above two cases; that is to say, -| (40 + 83), or 61^ 

 per cent, of their children would be Non- Artistic, and 

 I (60 -f 17), or 3 84, would be Artistic. The observed 

 numbers are 61 and 39, which agree excellently well. 



We may therefore conclude that the same law of 

 Regression, and all that depends upon it, which governs 

 the inheritance both of Stature and Eye-colour, applies 

 equally to the Artistic Faculty. 



Effect of Bias in Marriage. The slight apparent 

 disinclination of the Artistic and the Non- Artistic to 

 marry in their own caste, is hardly worth regarding, 

 but it is right to clearly understand the extreme effect 

 that might be occasioned by Bias in Marriage. Suppose 

 the attraction of like to like to become paramount, so 

 that each individual in a Scheme married his or her 

 nearest available neighbour, then the Scheme of Mid- 

 Parents would be practically identical wi th the Scheme 

 drawn from the individual members of the population. 

 In the case of Stature their Q would be 1*7 inch, instead 

 of 1 7 divided by v/2. The regression and subsequent 

 dispersion remaining unchanged, the Q of the offspring 

 would consequently be increased. 



On the other hand, suppose the attraction of contrast 



