{"collection":"aor","html_url":"https://unchartedknowledge.5gfusion.net/browse/aor/dv/0570.htm","path":"aor/dv/0570.htm","source_url":"https://sacred-texts.com/aor/dv/0570.htm","text":"The Da Vinci Notebooks\nThe density of a body of smoke looks white below the horizon while above the horizon it is dark, even if the smoke is in itself of a uniform colour, this uniformity will vary according to the variety in the ground on which it is seen.","title":"Vol. I: IX. The Practice of Painting: 570.","type":"page"}