in Astronomy, an aspect of the planets when they are 72 degrees distant from one another, or a fifth part of the zodiac.

**QUINTILLIANUS**, MARCUS FABIUS, a celebrated Latin orator, and the most judicious critic of his time, was a native of Calagurris, or Calahorra, in Spain; and was the disciple of Domitius Afer, who died in the year 59. He taught rhetoric at Rome for 20 years with great applause; and not only laid down rules for speaking, but exhibited his eloquence at the bar. Some authors imagine, but with little foundation, that he arrived at the consulship; but it is more certain that he was preceptor to the grandsons of the emperor Domitian's sister. There is still extant his excellent work, intitled, *Institutiones Oratoriae*, which is a treatise of rhetoric in 12 books; where his precepts, judgment, and taste, are justly admired. These institutions were found entire by Poggius, in an old tower of the abbey of St Gal, and not in a grocer's shop in Germany as some authors have asserted. There is also attributed to Quintilian a dialogue *De causis corruptae eloquentiae*; but it is more commonly ascribed to Tacitus. The best editions of Quintilian's works are those of Mr Obreight, published at Strasbourg in 2 vols 4to, in 1668, and of M. Caperonier, in folio. There is an English translation by Mr Guthrie.

Quintilian had a son of the same name, on whom he bestows great praises. This son ought not to be confounded with Quintilian the father, or rather the grandfather, of him who is the subject of this article, and who wrote 145 declamations. Ugolin of Parma published the first 136 in the 15th century; the nine others were published in 1563 by Peter Ayrault, and afterwards by Peter Pithou in 1580. There have also been 19 other declamations printed under the name of Quintilian the Orator; but, in the opinion of Vossius, they were written neither by that orator nor his grandfather.