John Playfair Quotes
The mind seemed to grow giddy by looking so far into the abyss of time.
John Playfair (1822). “The Works of John Playfair ...: With a Memoir of the Author ...”, p.81
John Playfair (1822). “Biographical memoir. Illustrations of the Huttonian theory of the earth”, p.415
John Playfair, James George Playfair (1822). “Biographical memoir. Illustrations of the Huttonian theory of the earth”, p.20
John Playfair, Adam Ferguson, Gordon Younger Craig (1997). “James Hutton & Joseph Black: Biographies”
John Playfair, James George Playfair (1822). “Biographical memoir. Illustrations of the Huttonian theory of the earth”, p.32