refers to the condition of raw clay ware when most of the moisture has evaporated leaving it soft enough to be carved or joined to
other pieces.

Slab
Bone dry
Leather hard
Slip mold

a dark purple with a little bright violet red

the correct answer for this question is:

it is system invented in 1872 that produced the first illusion of movement. basically it was a disk with a series of drawings around the edge, showing the same object in slightly different poses. when it was spun, it created the illusion of movement.

found this online : )