Da Vinci Spingarde

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Here are two ideas for a spingarde. The first is mounted on a horse tripod and has an adjustment for range-elevation using pegs. The second has wheels and a cover to protect the artilleryman. There are also some sketches of shells and a cart with a container for the explosive charge. There is an interesting dart with retractable lateral wings. Also noted are a number of formulae for making gunpowder. (Codex Atlanticus, f. 32r)