As we now know, Dufay was wrong in supposing that there were two different kinds of electricity, vitreous and resinous.
Dufay was regarded by his contemporaries as the greatest composer of his time.
He was esteemed by contemporary and later theorists as second only to Dunstable and Dufay.
Hence, in three masses by Dufay, still extant, the melodies and texts of three songs of his day are found.
Dufay proved that all bodies possess this quality in a certain degree.
