{"collection":"aor","html_url":"https://unchartedknowledge.5gfusion.net/browse/aor/dv/0110.htm","path":"aor/dv/0110.htm","source_url":"https://sacred-texts.com/aor/dv/0110.htm","text":"Prolegomena.You must first explain the theory and then the practice. First you\nmust describe the shadows and lights on opaque objects, and then on\ntransparent bodies.","title":"Vol. I: III. Six Books on Light and Shade: 110.","type":"page"}