{"collection":"aor","html_url":"https://unchartedknowledge.5gfusion.net/browse/aor/dv/0909.htm","path":"aor/dv/0909.htm","source_url":"https://sacred-texts.com/aor/dv/0909.htm","text":"The Da Vinci Notebooks\nOn instruments for observing the moon (909. 910).If you want to prove why the moon appears larger than it is, when it reaches the horizon; take a lens which is highly convex on one surface and concave on the opposite, and place the concave side next the eye, and look at the object beyond the convex surface; by this means you will have produced an exact imitation of the atmosphere included beneath the sphere of fire and outside that of water; for this atmosphere is concave on the side next the earth, and convex towards the fire.","title":"Vol. II: XV. Astronomy: 909.","type":"page"}