Wood, glass, brass, leather, white, red, green and black sand
Collection of Saastamoinen Foundation
Theory of General Relativity consists of a measuring machine on an old wooden table. The machine is an old, four pan balance with four hourglasses mounted on the pans. The different colors of sand (white, red, green and black) inside the hourglasses refer to the same categorizing and hierarchical meanings as in the “Theory of Four Elements”.