"Homes And Other Black Holes" - читать интересную книгу автора (Barry Dave)

The Floors

These should be sturdy and level. The only proven way to check for sturdiness is to drop a men’s standard sixteen-pound bowling ball (Always carry one with you!) onto the floor from a height of seventy-five feet through a hole drilled in the roof, then carefully note the results. (No, the seller will not object, unless he has “something to hide.”)

To check for levelness, you will need a standard piece of string and a standard rock. Using a standard knot, tie one end of the string, then, holding the other end of the string, stand in the middle of a room, and carefully note which way the rock points. Ideally, it will point toward the floor. If it points somewhere else, such as toward a wall, this is often an indication of nonlevelness.