the.com/popcorn machine
A device that turns dirt-cheap kernels into a theater markup miracle.
means A heated appliance that pops dried corn kernels with hot air or oil, usually tumbling them in a drum or kettle so they don't scorch.
from The device traces to the late 1800s, when inventor Charles Cretors adapted a peanut-roasting cart in Chicago, adding a steam engine to turn the kernels and a built-in burner to pop them on the spot — basically inventing the street-fair popcorn cart as we know it. 'Popcorn' itself is just literal: corn that 'pops' when its moisture turns to steam and bursts the hull, a word in use in English since at least the 1800s. The leap from horse-drawn carts to the glass-boxed theater-lobby machine happened as popcorn became movie-house currency during the Depression, when it was one of the few treats cheap enough to sell and profitable enough to matter.
- origin
- invented 1885, hit streets during Great Depression
- secret
- kernels pop from steam pressure, not dry heat
- margin
- movie theaters profit more from popcorn than tickets
- sound
- pop happens when internal pressure hits about 135 psi