What was the 5th electric appliance, behind the sewing machine, the fan, the kettle, the toaster, and before the vacuum cleaner and the iron? And it wasn't the fridge, washing machine, stove, oven, nor cake/baking/bread related... and not a hair dryer.
Light globe would not classified as an "appliance".
Even the radio might not be an appliance. What do you think?
en.wikipedia.org/wiki/Home_appliance
en.wikipedia.org/wiki/Invention_of_radio
This says the 5th appliance. Made me laugh anyway!
en.wikipedia.org/wiki/Vibrator_(sex_toy)