Much has been written as to the relative influence on the offspring of sire and dam. When both parents have characteristics in common, there appears in the offspring little to indicate that one parent is more prepotent than the other, or that one transmits in a greater degree than the other special organs or specialized characteristics. But when animals of the same genus, but of extremely divergent characteristics, are crossed, - as the horse (Equus Caballus) and the ass (Equus Asinus) - most interesting results are secured. When the horse is used as the sire, the produce - the "hinny" - takes on, it is said, more of the outward characteristics of the sire than of the dam. Its ears are smallish, the mane and tail fairly abundant, the foot rounded like that of the horse, and it neighs. The viscera and interal organs appear to be largely inherited from the dam. She is small, so is the hinny, the outward structure adapting itself to the internal organs. If the cross is reversed - the jack bred to the mare - a mule is the product. Its outward markings and characteristics are like its sire's - long ears, short and stubby hair on mane and tail, a stripe over the shoulders, a narrow foot and the sonorous voice of its sire. The outward characteristics of this hybrid are largely from its paternal ancestors; while the internal organs are large, like those of its maternal parent. This being so, the mule is larger than the hinny. In such violent crosses, it is certain that the sire transmits his external organs to the offspring more largely than does the dam; and the dam the internal organs, at least as to size, more largely than does the sire. When animals which are similar are united, it is probable that the same principle holds true to a limited extent. Then it would seem wise to select, when possible, dams of good size - those of large lungs, heart and viscera capacity - even though they may not be as close-made or of as fine outward form as is desired in the offspring. It may be confidently expected that, if a smooth, symmetrical, moderate-sized stallion be united with such a mare, the progeny will be far better as to endurance, beauty and potency than if the characteristics of the sire and dam were reversed. The practice of breeding large, even mammoth stallions, to small, unsym-metrical, unsound mares or to "any old thing," has done more to arrest improvement which should have been secured from the many good, home-bred and imported stallions than any other one thing, - possibly than all other adverse causes combined.