In order to see well the escutcheons with all the fullness which my sketches give them, it must be supposed that the udder of each cow is seen at its greatest plenitude of milk, such as would separate the hind legs to the greatest extent. In this way the escutcheon is seen as if the entire skin of the animal was placed flat, or as if the envelope of the milk bearing apparatus formed a plain surface, on which are drawn the elevations, the depressions, and all that is not visible to the eye, without the aid of hands or of movement of the cow, both that which is hidden at the further side and in the folds of the udder and of the thighs of the animal on foot.
In order to examine and to distinguish perfectly the escutcheon, one should place himself behind the animal and make it advance some steps, in such manner that the movements which it makes in walking should show, one after another, the parts which one needs to see.
One can also, in passing the nails over the space occupied by the escutcheon and leading the hand downward from above, in a manner contrary to the rising hair, and ruffling it, recognize without difficulty its form and its extent.
Theoretical explanations are always abstract and diffuse in their development. My method may at first appear difficult and complicated, which, indeed, pretended savans have chosen to affirm. Nevertheless it is not so, and in order to comprehend it, it is sufficient to study it. It is with this as with everything else, to know it is necessary to study and to practice.
The beautiful art which I am about to explain to agriculturists is most easily acquired. Its technical dictionary is composed only of certain words, of which the readers should, first of all, know perfectly the precise signification.
These words are Escutcheons, Epis or Tufts ascending, and Epis or Tufts descending. After he knows perfectly the different forms and the importance of these characteristic signs, he will know the whole subject as well as I do myself.
The Epis or Tuft, as one will see, participates with the escutcheon in the distinction of the orders—it multiplies the sub-divisions. It seems at the same time to complicate my method and to render it less accessible; but I have not felt myself at liberty to omit it, since it has an incontestible and important value.
If, among certain animals, the form and extent of characteristic signs are not exactly those of the drawings, but a sort of intermediate between the characteristic signs of two classes, he who applies the method should approximate them to the drawing of the classification from which they differ the least, and from that deduce the probable value.
To render my work perfectly clear, I had to enter into the developments very much in detail. Nevertheless, so extensive are these details that I believe I have given neither too many nor too few, and have confined myself simply within the limits of the possible, the indispensible and the useful.
And now, whoever my opponents may be, I proclaim boldly and without fear, that the escutcheon is the only incontestible characteristic sign that can enable one to discern, by simple inspection, the aptitude for milk production of each animal.