Page:Germ Growers.djvu/27

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marked out the most intelligent and best tempered pups, and he had bred from them only and had given away or destroyed the others.

Leopold. And about your cousin's dogs?

Furniss. Just let me finish. It seems that while one brother began to cultivate the breed upward, so to speak, another brother was living in a part of the country where thieves were numerous and daring, and there were smugglers and gipsies, and what not, about. And so he began to improve the breed in quite another direction. He selected the fierce and snappish pups and bred exclusively from them.

Leopold. And so from one ancestral pair of, say, a hundred or a hundred and fifty years ago, you have Tommy there, with his wonderful mixture of gentleness and pluck, and his intelligence all but human, and your cousin has a kennel of unintelligent and bloodthirsty brutes, that have to be caged and chained as if they were wild beasts.

Furniss. Just so, but I don't quite see what you are driving at.

Leopold. Wait a minute. Do you suppose the germs of cow-pox and small-pox to be of the same breed?

Furniss. Well, yes; you know that I hold them to be specifically identical. I see what you are at now.