Boethius, De institutione arithmetica libri duo · De institutione musica libri quinque, ed. Gottfried Friedlein (Leipzig: Teubner, 1867) — read from page images, with the critical apparatus separated from the text
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p. 2809. nsINMEEREERUENENUUNNNN Eme e. n pumEREREUUENUNUNUUEUNUTNUNNISUNNNUNMOUMNUUNIMIININUINUNNNEMENTUNMUMENN NUMEN EE K tonus B diatessaron F diapente | | Sit propositum minorem toni partem per consonan- tiam sumere in acutam partem atque gravem. Minor vero toni pars est spatium, quo duos tonos diatessaron conso- 5 nantia transcendit, Sit enim sonus .A- Intendo ab -A- diatessaron ad -B- Rursus intendo a -B- diatessaron ad -.C- Et ab .C- remitto diapente ad -D.- Tonus est igitur -BD- Rursus a -D- intendo diatessaron ad .E. HRemitto iterum ab .E- diapente ad -F- Tonus est igitur -DF. Duo igitur . sunt toni -BD- -DF-. Et erat -BA- integrum diatessaron; erit igitur -FA- minor toni pars, quod semitonium nun- cupatur. V 7 diatessaron | C E . B D F A | |] dd diapente
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