Now the most pure and simple way of calling the spirits or spirit is by a short oration to the spirit himself, which is more effectual and easy to perform than composing a table of letters; for all celestial operations, the more pure and unmixed they are, the more they are agreable to the celestial spirits: therefore, after the circle is drawn, the book, perfumes, rod, &c. in readiness, proceed as follows: (After noticing the exact hour of the day, and what angel rules that hour, thou shalt say,) "In the name of the blessed and holy Trinity, I do desire thee, thou strong and mighty angel 1 , Michæl, that if it be the divine will of him who is called Tetragrammaton , &c. the Holy God, the Father, that thou take upon thee some shape as best becometh thy celestial nature, and appear to us visibly here in this crystal, and answer our demands in as far as we shall not transgress the bounds of the divine mercy and goodness, by requesting unlawful knowledge; but ...