TIL about the Rømer and Réaumur temperature scales which are why Rankine is not just °R but °Ra. I guess everyone was doing it back then! https://en.wikipedia.

TIL about the Rømer and Réaumur temperature scales which are why Rankine is not just °R but °Ra. I guess everyone was doing it back then! https://en.wikipedia.org/wiki/R%C3%B8mer_scale https://en.wikipedia.org/wiki/R%C3%B8mer_scale