Various Solutions by Karen WirthVarious Solutions: Gas in Gas is one in a series of 3 dimensional sketchbooks exploring the classical states of matter (gas, liquid, solid). The work physically and visually illustrates the scientific concept of solutions. Images and objects take the place of instructional text. The book is made of lead, which is both the softest and heaviest of metals. Its easy malleability and very low strength tests our understanding of solid metal.