"Paragraph M8ag89-d1e68-d1e456" . . . . . . . . . . . . . . "4" . "Tractatus de magnete, Pars 2, Caput 3, Paragraph M8ag89-d1e68-d1e456" . . "10" . . "0001" . "M8ag89-d1e68-d1e456" . "draft" . . "0010" . . .