"Paragraph M8ag89-d1e68-d1e318" . . . . . . . . . . . . . . "4" . "Tractatus de magnete, Pars 2, Caput 2, Paragraph M8ag89-d1e68-d1e318" . . "7" . . "0002" . "M8ag89-d1e68-d1e318" . "draft" . . "0007" . . .