On the Magnetic Cure of Wounds

John B.? original: "Jo. B." — This may be a misreading of "Lo." for Louis/Luis, or an abbreviation for a specific editor or ecclesiastical title.
of?
Saint Granada? original: "S. Granat." — A reference to Luis de Granada (1504–1588), a famous Spanish Dominican friar and influential mystic writer whose works were widely translated.
...ary? original: "...ario" — Likely the suffix of a title such as Summario (Summary), Diario (Diary), or Rosario (Rosary).