Galileo had worked out this really wonderful experiment where he and his assistant had a lamp, each one of them was holding a lamp. Galileo would open his lamp, and his assistant would open his.
Así que Galileo ideó este experimento maravilloso en el cual él y su asistente tenían cada uno una lámpara, y Galileo encendía su lámpara y su asistente encendía la suya.