By this method Comte obtains 18 irreducible faculties, of which 10 are representative of the heart, 5 of the mind, and 3 of the character. To each of these he assigns a special organ. He places the organ of the heart in the posterior portion of the brain and in the cerebellum, the organs of the mind in the anterior portion of the brain, and those of character in the intermediary region. Anatomists are free to verify _a posteriori_ the separation of the 18 elements which Comte distinguished _a priori_ in the cerebral apparatus. The existence of these organs, in any case, appears to him to be sufficiently demonstrated, and anatomical determination is not very important. We might confine ourselves to the specification of the number and the situation of the organs, which we have deduced from the number and relations of the elementary functions. It would not be necessary for us to know their shape or their size. The utility of cerebral localisations resembles that which geometers draw from curves for the better consideration of equations.[196] The organ is simply the static equivalent of the function of the soul. It suffices for us to know its existence and its position so as to situate in it all the relations of the function itself, so to speak. It plays the part of a schematic drawing. So, the theory of the brain and of the soul is no longer “simultaneous.” In fact, the theory of the soul is first constructed by a subjective and independent method and without any consideration of the disposition of the cerebral apparatus. This disposition is deduced, afterwards, from the theory of the soul, once it is established.