Plate 2 of the Recueil d ouvrages curieux de mathmatique et de mcanique. Three mechanical objects, numbered 4, 5, and 6. The base of figure 4 is similar in design to figure 2 of Plate 1. The object, a solid ball inside a pierced one, is similar to one in figure 3, Plate 1. Figure 5 looks as if it may be fitted inside figure 6.

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