When reading Joyce long ago I was surprised to find that similar devices were popular in his time: https://www.jjon.org/joyce-s-environs/wonderworker https://ww

When reading Joyce long ago I was surprised to find that similar devices were popular in his time: https://www.jjon.org/joyce-s-environs/wonderworker https://www.jjon.org/joyce-s-environs/wonderworker If I'm remembering right, the main difference is that the "Wonderworker" also includes a vent.