In eius tympani cavo interponuntur octo tabulae transversae tangentes axem et extremam tympani circuitionem, quae dividunt aequalia in tympano spatia.
Within the drum are inserted eight cross-pieces going from the axle to the circumference of the drum, and these are arranged round the drum at equal intervals.
final_alignments\Vitruvius_Architecture_Book_10.json