Introduction
_ There are few points in the breeding of stock on which a greater variation of opinion has been confidently expressed than on the origin of the domesticated pig. It has been contended that our various types had a common origin in the wild hog, and that the difference in form, colour, and character amongst the local breeds is due, in the main, to the requirements, imaginary or real, of the interested residents in the particular districts. On the other hand, it is asserted with equal confidence, and probably with the same amount of actual proof, that it would be impossible so to improve the wild hog by selection as to render it the equal of the domesticated hog. There must, therefore, have been an infusion of blood of a cultivated breed of pigs to acquire even that amount of success which was noticeable in the improved pig of a century, or less, ago. Unfortunately, for this argument, it has not been possible to obtain any information of value as to the alleged source

......
全部内容，请购买此书。