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Small Lathe Made of a Sewing Machine, A Coppersmith's Wrinkle, and more

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Scientific American Magazine Vol 103 Issue 16This article was originally published with the title “Small Lathe Made of a Sewing Machine, A Coppersmith's Wrinkle, and more” in Scientific American Magazine Vol. 103 No. 16 (), p. 301
doi:10.1038/scientificamerican10151910-301