Of the temperaments of the testicles, the hot is lustful, apt to generate, particularly males, and at an early age has the genital parts covered with thick hairs, which extend to the surrounding part. The cold is the reverse. In the humid, the semen is copious and watery. In the dry, it is scanty and thick. A temperament which is moderately hot and dry has very thick semen, is most prolific, and rouses the person to early indulgence. Such persons have, at a very early period, thick hairs on their genital organs, and on the surrounding parts, as high up as the navel, and as low down as the middle of the thighs. Such a temperament is prone to venery, but is soon satiated, and readily hurt if compelled. When humidity combines with heat, such persons have thick hair, and much semen; yet they have not greater desires than others, but they can bear much venery without injury; and if both the moist and the hot combine properly together, they cannot safely abstain from venery. Those whose testicles are of the humid and cold temperament have no hair on the neighbouring parts; they are slow in beginning to copulate, and not much prone to the exertion. Their semen is watery, thin, without strength, and fit only for begetting females. The dry and the cold temperament together, resembles the former in every other respect, except that the semen is thicker, and altogether scanty. * * * * * COMMENTARY. The testicles were described by the ancient anatomists as being bodies composed of white glandular flesh, and surrounded by coats which they knew to be processes of the peritoneum. The semen they considered as a white frothy fluid, elaborated from the blood, by passing through the convolutions of the spermatic vessels. Aristotle held it to be a superfluity collected from all parts of the system. His theory of generation is similar to that of Buffon. For the hypothesis of the Epicureans, see Lucretius (de R. N. iv.) They taught that the fœtus is the joint production of the male semen, and something analogous secreted by the ovaria of the female. Galen has very ingenious ideas respecting the first organization of the fœtus, which he ascribes to a certain power in the semen, like that which Blumenbach calls a _nisus formativus_. (De Form. Fœtus.) SECT. LXIX.—ON THE PARTS THAT ARE OMITTED. Each of our members has its own proper temperament and faculty; but it is not necessary for us to describe the characters of all, since they are unlimited, and we propose to give only a brief system of instruction. Having treated of those which principally affect the whole body, of the others we shall merely direct them to be judged of in the same way, forming an opinion of the temperaments from their excretions, their other energies and symptoms. It is now time to treat of the cure of the intemperaments of the whole body. * * * * *