Natural magick by John Baptista Porta, a Neapolitane : in twenty books : wherein are set forth all the riches and delights of the natural sciences (1658)
Porta, Giambattista della, approximately 1535-1615 · London : Printed for Thomas Young, and Samuel Speed ... · leaf 385
himedes ; and I {hall add our own inventions , that the Readers may judge how far new inventions exceed the old. Fireis kindled byrefle&ion, retra&ion, and by a fimple and a compound Glafs. I {hall begin from a fimple reflexion, and from A Concave-Glafs that fball kindle fire behind it : which few… … With a Concave Pillar or Pyramidal , kindle fire: but very {lowly, with delay cnely, and in the Summer-Sun • it kindles in the whole line, and not in a point, but being extended by the point of accenfion of it* circled The fame will fall out by a Pyramidal Concave* Chap. XV. Of a Parabolical…
Magic -- Early works to 1800 · Science -- Early works to 1800 · Industrial arts -- Early works to 1800
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Geberis philosophi perspicacissimi, summa perfectionis magisterii in sua natura ex Bibliothecae Vaticanae exemplari undecunq[ue] : emendatissimo nuper edita, cum quorundam capituloru[m], vasorum, & fornacum, in uolumine aliàs mendosissimè impresso omissorum : libriq[ue] inuestigationis magisterij & testamenti eiusdem Geberis, ac Aurei triu[m] uerborum libelli et Auicennae summi medici & acutissimi philosophi mineralium additio[n]e castigatissima (1542)](https://img.insideoutlibrary.com/img/200/ia-geberisphilosoph00gebe-78-2.webp)
