The present article examines the textual transmission of the Aristotelian Mechanics, a treatise on mechanical questions now generally ascribed to the Peripatetic School. The treatise was edited three times in the nineteenth century, namely by Johannes van Cappelle (1812), Immanuel Bekker (1831) and Otto Apelt (1888); most recently, an edition was produced in the twentieth century by Maria Elisabetta Bottecchia (1982). Bottecchia's edition is a clear improvement over the previous editions in the extent of its research. Whereas the other editors of the Mechanics altogether consulted a total of nine manuscripts, Bottecchia considered nearly the complete manuscript material for her critical edition of the text. When I started my project I did not expect to find significant new results which would make a completely new critical edition of the text necessary.