Circular zodiacal lunar scheme; [Whole folio] Circular zodiacal lunar scheme; with rotary disk and pointer; representing the Sun. This device was used for locating the position of the Moon in the zodiac; to find propitious dates for blood-letting. At the four corners; the patron saints of the Guild; St John; St John the Baptist; St Cosmas; and St DamianImage taken from Guild Book of the Barber Surgeons.Originally published / produced in England [York]; 1486; with additions to 1768.England [York]; 1486; with additions to 1768.From: Guild Book of the Barber Surgeons.Egerton 2572; f. 51London; British Library.