It is best if the image of the light is not larger than the object examined, and to effect this, an illuminating lens with an iris diaphragm is often placed between the source of light and the illuminator.
The battle in which the sultan of Rum (1243) was defeated by the Mongols took place on the plain, and the celebrated Armenian monastery of St Gregory, "the Illuminator," lies on the hills 11 m.
In the 4th and 5th centuries may be mentioned Gregory the Illuminator, the " apostle of Armenia " (about 300), Ulfilas, the " apostle of the Goths," about 325; Frumentius, 1 a bishop of Abyssinia, about 327; Nino, the Armenian girl who was the means of converting the kingdom of Iberia (now Georgia), about 33 0; 2 Chrysostom, who founded, at Constantinople in A.D.
It has often been said that he commenced and frequently practised as an illuminator; this is dubious and a presumption arises that illuminations executed by Giovanni's brother, Benedetto, also a Dominican, who died in 1448, have been ascribed to the more famous artist.
It was not until some time after his death that the enemies of his son first alleged that he was not of the family of La Scala, but was the son of Benedetto Bordone, an illuminator or schoolmaster of Verona; that he was educated at Padua, where he took the degree of M.D.; and that his story of his life and adventures before arriving at Agen was a tissue of fables.
