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tLI.TOTRATED STOCK DOCTOR, 
titles, or equal qualities of milk. It could not be otherwise. AssuirVc.g 
that a given tuft has the same value at birth, it cannot be the same m 
adult age ; since, during life, an infinite number of circumstances occur 
to diversify the activity of the milky glands, without changing the figure 
or size of the tuft. 
Is it not sufficient to refer to the inequality of milk given by the sumo 
cows, according as they have had one, two, or three calves, in order to 
make clear that M. Guenon has assigned too much value to the mark which 
he has discovered? 
It often happens that two horses, having exactly the same constructure, 
and the same external forms, have not the samo energy, the same fitnes3 
for work. The difference is owing, evidently, to the temperament, and 
the activity of the principal external organs ; in other words, to conditions 
which it is often impossible to estimate by any direct method. 
Now, seeing that temperament has an influence on muscles and bones, 
the action of which, however, is partly mechanical, resembling that of a 
lever, and exerts this influence so powerfully as to render their movements 
unequal in respect both of power and promptness, can wc suppose that it 
has no influence on the entirely vital, or, at least, the entirely molecular 
Working of the mammary gland ? 
It might, therefore, have been argued a priori that the mathematical 
precision assigned to a classification of cows is contrary to the most gen- 
eral laws of physiology ; to propose a mark indicating that a cow will give 
so much milk daily, and for so many daj^s, is to deceive ourselves, or to 
attempt to deceive others : the study of the phenomena of life proves that 
the action of the organs depends not merely on the size and their form, 
but on the general condition of each individual 
We are able not only to oppose argument to the assertion of M. Guenon, 
but we can appeal to the difficulties hitherto experienced in applying his 
classification to practice. M. Guenon has not yet found a single pupil 
worthy of him. And among the thousands of persons who occupy them- 
selves with his metnod, is there a single one who has acquired sufficient 
skill tp justify the claims which the author makes for it? 
It may be affirmed that, to form pupils as skillful as himself in judging 
of cows, M. Guenon would not only have to teach them that a certain fig- 
ure for the tuft corresponds to a certain number of pints of milk , but ha 
would have, above all, to communicate to them his perspicuity, his talent 
for observation, and his great experience ; he would, in fine, have to fit 
them fpr estimating, in addition to the direction of tho hair of the twist, 
the whole of the marks usually employed in making choice of milch cows. 
Al l the attempts made ou the Guenon method, not excepting those of 
