On Thursday this time ;-) (it is Thursday isn't it?)
This is like Jeopardy;-) Here is the answer, you give me the question:
Ornament that was applied to the bulbous legs of Jacobean furniture, it was made up chiefly of beading, hollows, and cabling. The early Georgian period also used it to some extent.
If you do a google search for nulling, you will find it. I suspected that no one was going to find it after the first day or so, but figured someone would come up with null from the math clue.