A game of skill and entertainment for individual practice, characterized in that it is constituted by a hollow body, closed, transparent and curved surface, which is essentially filled with a liquid in which floats a small inner spherical body, which is, therefore, in permanent contact with the highest part at each moment of said outer closed body, with which it is possible to follow the aforementioned inner float some arbitrarily chosen trajectories on the surface of the outer transparent body, simply by rotating the this in the convenient directions. (Machine-translation by Google Translate, not legally binding)
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