Jeat Definition

There is also a factitious jeat made of glaſs, in imitation of the mineral jeat.

To make a Grey Colour.

Take iron ſcales, a little criſtal, and ſome ſmall quantity of jeat, grind theſe well together upon a painter's ſtone; the more jeat ye take, the ſadder the colour will be, and likewiſe the more criſtal you put to it the lighter.