It rises or falls for rain and fine, with much or less wind, and one end is "Nly" and the other "Ely" (what's Ely got to do with it?), and if you tap it, it doesn't tell you anything.
Ces mécaniques-la s’élevent ou descendent pour la pluie et le beau temps, selon qu’il y a plus ou moins de vent ; et si on les tapote, elles n’en disent pas davantage.