{"collection":"aor","html_url":"https://unchartedknowledge.5gfusion.net/browse/aor/dv/0737.htm","path":"aor/dv/0737.htm","source_url":"https://sacred-texts.com/aor/dv/0737.htm","text":"The Da Vinci Notebooks\nMake a bunch of iron wire as thick as thread, and scrub them with [this and] water; hold a bowl underneath that it may not make a mud below.\nMake an iron rod, after the manner of a large chisel, and with this rub over those seams on the bronze which remain on the casts of the guns, and which are caused by the joins in the mould; but make the tool heavy enough, and let the strokes be long and broad.\nFirst alloy part of the metal in the crucible, then put it in the furnace, and this being in a molten state will assist in beginning to melt the copper.\nWhen the copper cools in the furnace, be ready, as soon as you perceive it, to cut it with a long stick while it is still in a paste; or if it is quite cold cut it as lead is cut with broad and large chisels.\nIf you have to make a cast of a hundred thousand pounds do it with two furnaces and with 2000 pounds in each, or as much as 3000 pounds at most.","title":"Vol. II: XI. The Notes on Sculpture: 737.","type":"page"}