Ptolemy's Tetrabiblos : or, Quadripartite : being four books of the influence of the stars (1900)
Ptolemy, active 2nd century, Proclus, approximately 410-485, Ashmand, J. M · London : Printed and published by W. Foulsham · leaf 53
the dia- metrical points have been connected by a straight line, AB; the space of the two right angles, contained on the diameter, is then to be divided into aliquot parts of the two greatest denominations; that is to say, into halves, AFC, CFB, and into thirds, AFD, DFE, EFB: there will then be… … AC, CB, will make the quartile distance AC; and the division into three aliquot parts, AD, DE, EB, will make the sextile distance AD, and the trinal distance AE. The respective super-proportions (on either side of the intermediate quartile AC, formed by the one right angle AFC), will also again…
Astrology
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Sidereus nuncius : magna, longeque admirabilia spectacula pandens, suspiciendaque proponens vnicuique, praesertim verò philosophis, atq[ue] astronomis, quae à Galileo Galileo ... perspicilli nuper à se reperti beneficio sunt obseruata in lunae facie, fixis innumeris, lacteo circulo, stellis nebulosis, apprime verò in quatuor planetis circa Iouis stellam disparibus interuallis, atque periodis, celeritate mirabili circumuolutis; quos, nemini in hanc vsque diem cognitos, nouissimè author depraehendit primus; atque Medicea sidera nuncupandos decreuit (1610)](https://img.insideoutlibrary.com/img/200/ia-sidereusnunciusm00gali-31-11.webp)
