remained for ever useless if a second had not been made, which implies an equal degree of genius as the first required of patience--I mean the mode of multiplying by engrafting those precious individuals which unfortunately cannot propagate or transmit their excellent qualities to their posterity. * * * In the animal kingdom, most of those qualities which appear to be individual are propagated and transmitted in the same manner as their specific qualities. It was therefore more easy for man to have influence upon the nature of animals than upon that of vegetables. Particular races in any species of animals, are only constant varieties, which are perpetuated by generation. But in the vegetable kingdom there are no races, no varieties so constant as to be perpetuated by reproduction. In the species of the hen and pigeon, a great number of races have been very lately produced, all of which propagate their kinds. In other species, we daily rear and improve races by crossing the breeds." (87.) _Breeding in-and-in._--Though there are several methods pursued by breeders for the improvement of flocks, the one most in vogue is, that of choosing individuals of the same family, and breeding _in-and-in_. It is however a plan requiring, for the safety of the flock, either very great skill in selecting the males and females, or only to be followed to a very limited extent. No subject ever called forth so much random controversy, and no evil has ever so clearly shown itself as such; yet it is only recently, that people have opened the intellectual eye to the dangers of a practice, against which the ablest pens were long and vainly blunted. The object of breeding _in-and-in_ is to strengthen good qualities and get rid of bad ones, as speedily as possible; and it is plain, that if we happen to select animals with slight imperfections, these imperfections will become hereditary, and will go on assuming a worse and worse type till the breed be destroyed. Culley, however, was of opinion, that less risk is run by breeding _in-and-in_ than is generally supposed, and instances the wild cattle in Chillingham Park, in the county of Northumberland, which, having been confined for several hundred years without intermixture, must have bred from the nearest affinities, and yet are just as they were five hundred years since. With all due deference, however, to the opinion of the late Mr Culley, I must assert, that I cannot perceive in what manner wild cattle can be made to illustrate the case in point, as it must be evident, that animals in a state of nature differ essentially from those in charge of man, in regard to the propagation of infirmities, as the former, if born with a radical defect, will, ten to one, never see the age which suits them for reproduction; while the latter, from the care bestowed upon them, will, even when very delicate, in many instances be bolstered up till they have entailed upon posterity an accumulation of their already aggravated maladies.