Note 500 — Chapter IV · PARMENIDES OF ELEA
Reading edition
My colleague, Dr. Fraser Harris, points out to me that Alkmaion’s πόροι may have been a better guess than he knew. The nerve-fibres, when magnified 1000 diameters, “sometimes appear to have a clear centre, as if the fibrils were tubular.”—Schäfer, Essentials of Physiology (7th edition), p. 132.