METHODS OF BREEDING 109 



tively small number of either outstanding good individ- 

 uals or outstanding poor individuals. These are repre- 

 sented by the dots in the upper and lower points of the 

 diamond, respectively. 



Figure No. 1 in the cut represents the wild hog in its 

 native state. It occupies the position on the base line, 

 or the starting point from which improvement in the 

 several breeds was made. 



Figure 2 represent^ the razor-back, or the hog that was 

 once domesticated and then allowed to revert toward its 

 original state, such as are found in the forests of the 

 southern states of this country. 



As represented the razor-back is a hog of higher grade 

 than the wild boar. The average razor-back is practi- 

 cally equal to the best individuals of the wild hog, while 

 the poorest razor-back is somewhat inferior to the aver- 

 age wild hog. 



Figure 3 is supposed to represent the scrub. This 

 shows a considerably wider degree of variation than the 

 razor-back. The best scrub is very much better than 

 the best razor-back, and the average scrub even is a 

 little better than the best razor-back, while the poorest 

 scrub, as represented by the lower part of this diamond, 

 is almost as good as the average razor-back. 



Figure 4 represents the grade hog. This again shows 

 a wider degree of variation and shows that the best 

 grade is very much better than the best scrub. The 

 average grade is also considerably better than the aver- 

 age scrub, while the poorest grade is a little better than 

 the poorest scrub. 



Figure 5 shows the pure bred hog. This as will be 

 seen shows the widest degree of variation, the best pure 

 bred being very much better than the best grade, while 

 the poorest pure bred is not very much better than the 



