And so, they would come in and you would do — Anybody that was going to show an experiment, which was kind of a new word at the time, demonstrate some principle, they had to do it on stage, where everybody could see it.
Y así, venían y Ud. haría — Cualquiera que fuera a mostrar un experimento, que era algo como nuevo entonces, demostrar algún principio, debían hacerlo en el escenario, donde todos pudieran verlo.