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

- - - - - folio image: 132v - - - - -

Common quarry sand

In a frame, If you cast it hot, sand will bubble; thus you have to just dry it.

at left top margin of folio 132v

I have tried to prevent molds blended with sand from cracking when annealed, and thus not get any with flaws that crack.