Karyoplasma

We do not know because Fahrenheit didn’t document it, and i wouldn’t be surprised if he didn’t keep track of it through his test runs either. He didn’t say which salt and how much of it in how much water, no purity indication, no nothing. He was a craftsman, not a chemist and made the scale to sell his, I concede, at the time superior thermometers. He basically vibe coded a scale in the 1700s.

But that’s all just hogwash, Fahrenheit today is literally defined through Celsius, so the US uses a metric scale but with a factor and an offset they pulled out of their ass to make it more rollercoaster like the rest of the units they like. The same as pretty much every unit they use: inch is defined through meters, pound via kilogram, just butchered for the vibes of yore. Good for them.

To offset that, make them drunk. Drunk people boil at lower temperatures than sober ones.