 The illustrations are often surreal parodies of things in the real world, such as a bleeding fruit, a plant that grows into roughly the shape of a chair and is subsequently made into one, and a copulating couple who metamorphose into an alligator.Others depict odd, apparently senseless machines, often with delicate appearances and bound by tiny filaments.Some illustrations are recognizable as maps or human faces; while others (especially in the "physics" chapter) are mostly or totally abstract.