but we know nothing _positive_, and because it is so, Mr. Reeder and Mr. Hardin won’t believe it is so or can be so. In addition to what Mons. Magne, the eminent French veterinarian, one of the most celebrated medical professors in France has written, Professor Arnold, of Rochester says, when indorsing what Magne writes: “The size of the escutcheon is regarded as the measure of the quantity of blood supplied to the milk-producing vessels, and are evidence of their capability of elaborating milk. In the same way, the veins take up the blood, and carry it back in the milk veins which pass through the bag and along the belly, and enter the body through one or more holes, on their way to the heart. The size of these milk veins, and the holes where they enter the body, vary with the escutcheon, and like it, give evidence of the quantity of venous blood passing away, from and through the udder, and they have the same significance with reference to quantity, as the supply of arterial blood and the size of the escutcheon.” Mr. Reeder also quotes the weights of cattle given by Guenon, and triumphantly exclaims, whoever saw such small cows in this country? Guenon distinctly quotes the weights, as net dead weight, or the animal deprived of its head and horns, its hide, entrails, and feet, and gives the excellent reason for it when he says: “If I had made the calculations for the animal on the hoof, the figures given by me would present a great difference, which would increase according to the amount of fat, sometimes to double the weight.” Unfortunately, Mr. Reeder did not know enough of Guenon’s facts to be aware of this clear statement, and supposed the weights were live weight. Again, he says the commission did not examine the stock correctly. _He_ would have looked at an animal, decided what escutcheon it had, or “to which class and order she belongs, and then append the figures of Guenon as the result. Any other mode of proceeding is not testing the Guenon system.” Here again his lack of knowledge of the system is shown; it would be exceedingly unjust to the reputation of Guenon, as he distinctly declares the size, the age, the breed, the treatment, the season, the period of gestation, &c., shall be fully considered. It is the judgment of just such men passed upon the system, which have tended to throw any doubt upon the merit of Guenon’s assertions. What would be thought of the judgment of such a person, if told by a physician to administer three things to a patient, and he gave but one, and the patient died, and he excused himself by saying, “you told me to give him medicine, and I gave it.”