I have added to this new edition— 1st. Two new classes, sub-divided also into six orders, (the Left Flanders and the Double Selvage.) 2d. Two varieties of escutcheons, having some similarity with the others. 3d. Finally, the classification of the bull. These three additions, unpublished until now, complete and generalize the system of characteristic signs, by which one can prove the absolute and relative superiority or inferiority of each individual of the race. These new forms of escutcheons were known to me at the time of the publication of my first issue, and which I had already announced; but they occurred so rarely in the races which were familiar to me, that I thought they were not worth publishing. But, now, since I have traveled so much, not only in France, but in foreign countries, I have convinced myself that these classes occur much more commonly in certain races than I had thought at first. I have felt the necessity of putting them in my method, and have given them their proper place. In respect to the two new varieties of escutcheons, they are like an appendix to the classification, and characterize the product of crossing between different classes. To state precisely their signification and to value their corresponding milk product, it is necessary to compare these escutcheons with the order of the class to which they are the most analogous. When I shall have described the different families of true cows, as well as their division into orders, the yield or the quantity of milk, their butyraceous qualities, and the greater or less period of its duration of yield during gestation, I will pass to the bastard cows, which, though perfectly similar in form and color to others, differ essentially from them, for they lose their milk as soon as they are pregnant. This close resemblance is a source of errors to the most practiced judges.