Furniture to allow a single person to sit down, which has a back and legs, as well as a platform for sitting. Chairs often feature cushions made from various fabrics. All different types of woods have unique signature marks that can help in easy identification of the type. Both hardwoods and softwoods are used in furniture manufacturing, and each has their own specific uses. Most commonly, quality furniture is made out of hardwood which is made from oak, maple, mahogany, teak, walnut, cherry and birch. Highest quality wood will have been air dried to rid it of its moisture. Furniture Furniture
Egg of Columbus (mechanical puzzle) Egg of Columbus (mechanical puzzle) The names Egg of Columbus and Columbus Egg have been used for several mechanical toys and puzzles inspired on the legend of Columbus balancing an egg on its end to drive a point. Typically, these puzzles are egg-shaped objects with internal mechanisms that make the egg stand up, once the users discovers the secret. Mechanisms typically used in such toys include moving weights, mercury flowing in sealed tubes or compartments, and steel balls rolling on grooves and pits. A Columbus Egg puzzle using a rolling ball was described in an 1893 book. The Montgomery Ward