"Paragraph M8ag89-d1e68-d1e487" . . . . . . . . . . . . . . "4" . "Tractatus de magnete, Pars 2, Caput 3, Paragraph M8ag89-d1e68-d1e487" . . "12" . . "0003" . "M8ag89-d1e68-d1e487" . "draft" . . "0012" . . .