Floating globes use magnetism to keep them afloat. For some globes, there’s a C-shaped apparatus that holds two different magnets — one above or below the globe and one inside the globe. The magnet ...

I HAVE no intention of discussing the beautiful experiments of Prof. A. M. Meyer on floating magnets; but as a privately expressed opinion of mine has appeared in NATURE, vol. xviii. p. 260, I feel ...