nd with cated and so difficult:to make, can be formed with the increases in measure as the speed:of a body moving in one of them form a ring, as shown, in Fig. 1, by pasting same ease. This method of manufacture may likewise it augments ; and, in order to obtain a diminution of the two… … cylindrical sections concen- EXPERIMENT WITH -PAPER RINGS, trie with the blades, and of cutting out templets, second ring, give the paper a single twist (Fig. 2), and which, when afterward. before completing the third ring give the strip two centered, permit of carving twists. These twists in the…
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