040r - - - - - [continued]
being at all expert in painting. If your glass pane is bulging as if taken from the belly of a jar, it will show better. When you apply your turpentine colors to your glass panes, first place them on a hot tile &, once they are hot, spread your colors & leave it a while on the tile, then lay down your tin sheet.
Dye
Some take the root of Lapathium acutum maius, which looks like monk’s rhubarb or sorrel, & with the root, which is yellow in summer, they dye thread & similar things.
Aqua fortis
Some put on for four pounds of substance ofaqua fortis four that is in the retort four ounces of common water in the receptacle, which is better than putting it into the retort. One causes alum to de—phlegm & calcine, so that the water does not have as much dregs. Many make it without de—phlegming the alum.
Vinegar
One takes for granted that the mineral salt that looks like marble & is called Cardona salt in Catalonia & at the border of Spain, jec when one heats it red—hot & throws it in the red hot or quite hot into wine, it turns it into very good vinegar. Some make it with water poured on pomace soured after being pressed by grape pickers, but it will not keep & spoils in heat & thunder storms.
Buttons of vermeilles
Because vermeilles do not fear fire, one cuts them into lozenges flat on one side, then one joins them together in a star shape in a paste of ground enamel, which one then melts & one gilds the enamel with gold leaf which one reheats.
Grottos
To fill some empty place that cannot be laden with some sort of hanging rocks, one puts a piece of thick parchment close to the fire, which shrinks & crumples. Then one paints it with distemper, then in oil. Next one affixes it.