Harmony exists in nature, because each being in it follows peaceably the laws that govern his individuality; it will be the same in humanity, when universal reason shall comprehend that human order is pre-established in the co-operation of individual faculties left free in their manifestations; and that to establish a factitious, wholly imaginary order; that is, true disorder, is to retard the coming of order, peace and happiness. Let us refrain then from all classification of faculties and functions according to the sexes: besides being false, they will lead us to cruelty; for we shall oppress those, whether men or women, who are neither yielding enough to submit to it nor hypocritical enough to appear to do so; and we shall do this without profit to human destiny, but, on the contrary, to its detriment. Here, gentlemen, is a _nominalistic_ theory which I challenge you to overthrow by sufficient reasons: for, as in the first, I shall have answers to all your objections. We now come to our last theory, which is yours in the major and minor terms, but the opposite in the conclusions. IV. All the different parts of the same organism are modified by each other, and in this manner the functions become mutually modified. Now, man and woman differ from each other in important organs. Each of the sexes must therefore differ from the other not only through the organs that distinguish them, but through the modifications produced by the presence of these organs. This, gentleman, is my first syllogism: I know that we shall not contest this point--it is classical Biology. Let us investigate anatomically the organic differences to which sexuality subjects man and woman. _Nervous System._ The so called nerves of feeling are more fully developed in woman than in man, those of motion are less developed in the former than in the latter; the cerebellum is more fully developed in the head of man than in that of woman; in the latter, the antero-posterior diameter of the brain preponderates over the bi-lateral, which is greater in proportion in the masculine sex: it is also observed that the organs of observation, circumspection, subtleness and philoprogenitiveness are more prominent in the head of woman than in that of man, in which the reasoning organs, with those of combativeness and destructiveness predominate. _Locomotive System._ Man is larger than woman, he has more compact bones, and larger and better developed muscles, his thorax is the reverse of that of woman, in which, the greatest breadth is between the shoulders, while, with him, it is at the base; the pelvis is larger and broader in the female than the male sex.