The Nuttall Encyclopedia
A name given by the Hindus to the four ages of the world, and, according to M. Barth, of the gradual triumph of evil, as well as of the successive creations and destructions of the universe, following each other in the lapse of immense periods of time.
Wood, James, ed. Entry for 'Yuga'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/y/yuga.html. Frederick Warne & Co Ltd. London. 1900.