548 
LEAD. 
it becomes of an uniform yellow colour, called mas - 
sicot by the painters. This yellow powder, being 
well dried, is thrown again into the furnace, where 
it is constantly stirred in a continued heat, so that 
in about forty-eight hours it acquires a vivid red in- 
clining to orange colour, and is known by the name 
of minium or red lead. 
The heat employed in the manufactory of red 
lead must not exceed a certain degree, or the metal 
will be converted into a yellow flaky calx called 
litharge. 
