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

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Catching crayfishes

On the end of a stick, attach pieces of liver or lung, from beef or mutton. Then hang a basket to the stick with a little string. Put the basket into water where crayfishes eat; they will soon aggregate on the flesh. Pull very gently your stick out of the water; the crayfishes which will try to return to the water will fall into the basket.