008r - - - - - Gold lettering on paper
Write with milk of the fig tree then let it dry a little, next lay the goldleaf, & once quite dry, rub with a linen cloth and only the lettering will remain.
To explode grenades and give force to fireworks
Put into the powder one sixth as much of quicksilver
Tempering bullets to pierce bullet—proof armor
Heat the lead bullet as much as you can without melting it, and once it is hot dip it into the strongest vinegar that you can. And do this four or five times. Afterwards, mince some lard very finely and some linen also very delicately, mix all this together and use it as wadding, making it go into the arquebus or pistol with a little strength and very tightly. And before shooting, if possible, the bullet should be hot.
To make a breach in a wall by night
Having made a hole in a wall as you know, put one mortar inside, charged with powder, almost flat, and another upright, then fill in the hole and fire.