Making and Knowing
A minimal edition of BnF Ms Fr 640 in English Translation

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Killing snakes for molding

Some put a drop of aqua fortis into their mouths, which stupefies them, so that the head and the body look dead. But the head is still alive, and when you stick it with a needle in order to fix it to your mold, it moves and spoils and undoes everything. Therefore, to kill your snake, put it into a bottle filled with good vinegar and some spirits. Do the same with lizards and other similar animals.

at left bottom margin of folio 109v

If you want to keep them, you can put them in a pipe full of dirt in a garden outdoors, but it is necessary that the pipe be covered with latten wire, because otherwise, the snakes will crawl and climb up quite high.