Page:Popular Science Monthly Volume 22.djvu/248

236 a curved bottom and diverging in like manner. The crux of Staffa is Scallop or Clamshell Cave. Inattention has caused the various authors to describe it as if there was nothing astonishing in the sudden interruption of the columns, which are "bent so as to form on one side a



series of ribs not unlike an inside view of the timbers of a ship," while "the opposite wall is formed by the ends of columns, and bears a general resemblance to the surface of a honey-comb." Sixteen feet wide,