Maioris autem tympani labrum aequis intervallis ccclxv puncta habeat signata, minor vero orbiculus in extrema circinatione fixam habeat ligulam, cuius cacumen dirigat ad punctorum regiones, inque eo orbiculo temperatum sit foramen, quia in tympanum aqua influit per id et servat administrationem.
The edge of the greater drum is to have 365 points marked at equal intervals. The lesser drum is to have on its outside circumference a tongue fixed, and is to direct the tip towards the places of the points. In the same drum a proportionate perforation is to be adjusted, because the water flows through it into the drum and guides the working.
final_alignments\Vitruvius_Architecture_Book_9.json