phonomotor
... that the phonomotor, patented by Thomas Edison in 1878 and powered only by the human voice, could drill a hole in a board?
... that the <b id="mwGWc"><a href="./Phonomotor" id="mwGWg" rel="mw:WikiLink" title="Phonomotor">phonomotor</a></b>, patented by <a href="./Thomas_Edison" id="mwGWk" rel="mw:WikiLink" title="Thomas Edison">Thomas Edison</a> in 1878 and powered only by the human voice, could drill a hole in a board?