1725. Actually they spoke from above the middle of the head, at a moderate distance, but that location does not prevent them from constituting the pleura. For the inward membranes of the body are continued in membranes of the head, for example, in the pituitary membrane of the mouth and then in the meninges of the brain. This is why they were heard overhead, when otherwise they are on the level of the chest, from which region, at a distance, they* were first detected. * This word is in the feminine gender in the original; see 1726 at the end.