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Fig. 1. Light aluminum foil boat floating in an aquarium filled with invisible sulphur hexafluoride. First citation in article

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Fig. 2. Magnetic track under construction for superconducting train. One can see the individual rectagular magnets on the track. The light blue object suspended under the track is a “train” consisting of two superconducting tablets enclosed in foamed rubber. The latter retains a larger amount of liquid nitrogen for cooling. First citation in article

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Fig. 3. The entire superconducting train set, including the upside-down stretch and illumination. The tower in the middle holds the track. First citation in article