Title: Chronometria or, the measure of time in directions. According to a new, natural, and accurate institution. Containing tables of the equation of arch's of direction, thereto corresponding. Whereby with much facility, directions in all nativities are made to keep time with accidents, within the limits of an astronomical error. Manifestly evidencing and proving, the excellent and undeniable verity of astrology, and rendring that caelestial science, as conspicuous, and demonstrable, as any other part of the mathematicks whatsoever. As also, divers necessary, and exquisite rules, and precepts of art, together with the use and explanation of the tables
Subjects: Astrology