644.
Four ounces virgin wax, four ounces Greek pitch, two ounces incense,
one ounce oil of roses, first melt the wax and oil then the Greek
pitch then the other things in powder.
645.
Very thin glass may be cut with scissors and when placed over inlaid
work of bone, gilt, or stained of other colours you can saw it
through together with the bone and then put it together and it will
retain a lustre that will not be scratched nor worn away by rubbing
with the hand.
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