50 The Third and Fourth Generation 



Wright did produce a breed of sheep, the 

 Ancons, by mating this ram to its own off- 

 spring, and so inbreeding for several generations. 

 The Ancons were long a favorite breed, until 

 replaced by sheep with much finer wool. 



In 1889 there appeared suddenly in a herd 

 of Hereford cattle at Atchison, Kansas, an 

 animal without horns. This single animal was 

 the founder of the race of polled Herefords. 

 Among some orange seedlings brought to the 

 United States by the Department of Agriculture 

 from Bahia, Brazil, and planted in California, 

 was one that when mature produced the peculiar 

 seedless orange now commonly known as the 

 navel. From this single tree cuttings have 

 been taken to start others, and in this manner 

 there have been derived from the one original 

 tree all our orange trees that bear navels. 



Note that the short-legged sheep did not 

 arise by the selection of gradually shorter and 

 shorter legged sheep, the hornless cattle by the 

 gradual disappearance of the horns, or the 

 navel orange by the slow elimination of seeds 

 until the vanishing point was reached; but in 



