A Temperature Scale with a Negative Slope

Yes, really. The Delisle (°D) temperature scale has a negative slope. (The original version of the Celsius scale did as well.) Check out Wikipedia's comparison of temperature scales.

I just tweeted about it.

Delisle (°D): because we like temperature scales with a negative slope (cue Tom Jones): https://t.co/znCcYoJR0s pic.twitter.com/m5M5nmnyZa

— Mason Porter (@masonporter) February 15, 2016

I started going down the rabbit hole earlier today because of today's XKCD.