Magistery

[T]hey made proofe of the ſaid flowers dried, and this high magiſterie they found, That being beaten to pouder, they cured thoſe of the bloudie flix,^([sic – meaning flux]) vvho lay at the very point of death upon that diſeaſe; […]

Source: wiktionary

[…] I have been here long enough, if I were matter capable thereof, to be made the Philoſophers Stone, to be converted from VVater to Povvder, vvhich is the vvhole Magiſtery: I have been beſides, ſo long upon the Anvil, that methinks I am grovvn malleable, and hammer-proof: I am ſo habituated to hardſhip.

Source: wiktionary

This wanton Information being over, Daphnis, who had ſtill a Childish Pastorall mind, would presently be gone, and run up to Chloe, to have an experiment with her, how much he had profited by that magistery, as if indeed he had bin afraid lest staying but a little longer, he could forget to do his trick.

Source: wiktionary

But yet farther, Gain aſſurance of thy Peace with God in Chriſt, and conſequently of thy future Happineſs; and be frequent in the Contemplation and Improvement of it. This is the great Engine of a Chriſtian, a Magiſtery that was never attained by the moſt exquiſite Philoſopher, nor is attainable but in and by the knowledge of Chriſt, who brought Life and Immortality to light: […]

Source: wiktionary