Ergo Ctesibius cum animadvertisset ex tractu caeli et expressionibus spiritus vocesque nasci, his principiis usus hydraulicas machinas primus instituit.
Ctesibius, therefore, when he observed that the air being drawn along and forced out gave rise to wind-pressure and vocal sounds, was the first to use these principles and make hydraulic machines.
final_alignments\Vitruvius_Architecture_Book_9.json