A magical ritual published at Basle in 1575. The text is in Latin and appears to have been influenced by Paracelsus. It is of Christian, not Jewish, origin, and although the authorship is unknown, it is probably the work of an Italian. Only one of its nine volumes still exists: dealing with the institutions of magic, the work is entitled Isagoge, which means "essential or necessary instruction."
The book introduces the ritual of the Olympic spirits who dwell in the air and among the stars and who govern the world. There are, we are told, 196 Olympic provinces in the universe: thus Aratron has 49; Bethor, 42; Phaleg 35; Och, 28; Hagith, 21; Ophiel, 14; and Phul, 7. Each of the Olympic spirits rules alternately for 490 years. They have natural sway over certain departments of the material world, but outside these departments they perform the same operations magically.
Thus Och, the ruler of solar affairs, presides over the preparation of gold naturally in the soil. At the same time, he presides magically over the preparation of that metal by means of alchemy. The Arbatel states that the sources of occult wisdom are to be found in God, spiritual essences, and corporeal creatures, as well as in nature, but also in the apostate spirits and in the ministers of punishment in Hell and the elementary spirits. The secrets of all magic reside in these, but magicians are born, not made, although they are assisted by contemplation and the love of God.
It is sufficient to describe the powers and offices of one of these spirits. Aratron governs those things that are ascribed astrologically to Saturn. He can convert any living thing into stone, can change coals into treasure, gives familiar spirits to men, and teaches alchemy, magic, medicine, and the secret of invisibility and long life. He should be invoked on a Saturday in the first hour of the day. The Arbatel was said to be one of the best authorities on spiritual essences and their powers and degrees.