(1) (p. 47). Etigene Muntz, Leonardo do Vinci, Artist, Thinker, and Man of Science, 2 vols., New York, 1892. Vol. II., p. 73.
SOXPkY61OawS1GxmR/N1Q+6YOKqOVkHywkvZ+XT4KI22MUsQniYN4teglpRcZYJF
