1130. There are others besides, who work within the head in almost the same way, but not with such an obvious force of suction-for instance, those in the vicinity of the left inner ear, who were also so working for quite a while. I was told they were the ones who almost in the same way draw the spirituous chyle from the brain and guide it toward the heart, so that it may join with the body's chyle. So they constitute what answers to the jugular veins, which likewise have a drawing power. It is a known fact that the jugular vein descends to the region where the body's chyle rises up through the thoracic duct, with the purpose of joining the cerebral spirits* with the body's chyle, to form the blood. Those who were working within were those constituting that province or region where the jugular vein is, above the thoracic duct, as well as those making up the upper part of the duct. Into this also run some ducts carrying lymph. * I. e. the "animate spirits" or "the soul's spirits," being the purest substance of the blood.