The progeny of most domesticated animals often bear a striking resemblance to the grandmother or grandfather, and it is well known that the desired changes cannot be effected on a breed, or that the desired breed cannot be produced, till the third, fourth, or even the fifth crossing, so that the importance of having few defects in a stock will be readily admitted, seeing their debasing consequences are carried through whole generations, and that though absent in one remove, yet that they may appear in the next. Both sire and dam should be chosen as free from defects as possible, a thing often neglected in rearing domestic animals, especially horses, where the opinion is in vogue, that no matter how debilitated and worn out may be the dam, yet that if coupled with a young and perfect sire, a healthy handsome offspring will be the issue; than which idea nothing can be more absurd, as such animals, if left to nature, would seldom or never come in contact, owing to the one party never attaining a decrepit age, but perishing on its verge. (94.) _The sex of the progeny is supposed to be the result of the relative ages of the parents_; thus, issue from a young male and an old female will in general be feminine, while that from an old male and a young female will generally be masculine; and it has been proposed to turn this, apparently a law of nature, to account, in the management of flocks, as it must often be of consequence to obtain, at will, a considerable increase of the sex most wanted. On this subject there will be found an interesting paper in the first number of the _Quarterly Journal of Agriculture_, entitled, "A method of obtaining a greater number of One Sex at the option of the Proprietor, in the Breeding of Live-Stock," and from this I extract the following:-- "In the _Annales de l'Agriculture Française_, Vols. xxxvii. and xxxviii., some very interesting experiments are recorded, which have lately been made in France, on the breeding of live-stock. M. Charles Girou de Buzareingues proposed, at a meeting of the Agricultural Society of Séverac, on the 3d of July, 1826, to divide a flock of sheep into two equal parts, so that a greater number of males or females, at the choice of the proprietor, should be produced from each of them. Two of the members of the society offered their flocks to become the subjects of his experiments, and the results have now been communicated, which are in accordance with the author's expectations.