A few experimental proofs have been invoked, in support of Gall’s opinions of the cerebellum. We will cite a remark made by Serres, as to those bulls killed by striking them on the back of the neck. “The penis, in those where the cerebellum was injured, oscillated very evidently during the experiment.” The same gentleman observed a very marked erection in a young horse, who was killed by plunging a knife into the cerebellum. Segalas has produced the same effect in Guinea pigs, by pushing a stylet into this organ. The principal proofs, however, have been drawn from the action of the diseased cerebellum on the genital apparatus. Thus, the erection of the penis in those who die by hanging, has been attributed, by Gall, to the affection of the cerebellum in this kind of death. Cruvelhier has contested this explanation. He thinks it may be explained by the stasis of the venous blood. “Respiration,” says he, “is retarded, in consequence of the medulla oblongata; and hence results a semi-asphyxic state, favorable to erection. In hanging, there may be an affection of the cervical part of the medulla; and priapism has been observed more than once in lesions of this part.” Phrenologists have also shown, that this symptom often follows the application of a blister or seton to the neck. Another fact, to show the connection of the cerebellum with the genital apparatus, is that of a soldier, whose generative powers had disappeared, after the fleshy scalp of the occiput had been removed by the blow of a sabre. We doubt whether similar cases to this, which was observed by Larry, have often occurred; although Dr. Bischoff has advanced, that wounds of the back of the head, and blows on this part, have often been followed by inflammation of the genitals. Peculiar excitement of these organs has more than once attended a disease of the cerebellum. We have already mentioned this fact; and the cases stated were selected as those where the affection of the cerebellum might be considered as produced by venereal excesses. In those now to be mentioned, the genital excitement is, or seems to be, the consequence of this affection.