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

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Soldering a vise

It is good that the jaws of the vise should be high for use in making a long piece, and that they join well to clamp a thin object. In order to solder the nut, after you have made the bolt, you will make a long iron strip of the right thickness to fit into the notch of the bolt when red hot, and you will bend it all around [the bolt] by striking it with a hammer. Once it is well wrapped around, you will insert the bolt around which the nut is wrapped.