Hard to Kill
One of the temperature scales that competed but succumbed is the Reamur scale, invented by the French scientist Rene-Antoine Ferchault de Reamur in 1731 - when France was a powerhous of research and innovation. I remember reading as a kid old physics and chemistry books that treated the Reamur scale as one of the main competitors.
But for years afterwards, the Reamur degress never made another appearance - probably the were undeservedly sharing the dustbin of history with noxious ideologies.
But today at work a batch of instruments to calibrate arrived: together with three pH-meters (to calibrate to the same standard of the UKAS and NIST) there was also a thermometer - a digital one with a long stainless steel stem, typical design for measuring the temperature of liquids in big containers. So far so good, but the display had the symbol °R on it. So I thought: "Can it be, Reamur degrees?".
I asked to the lab manager and she said that yes, it's a Reamur thermometer. It is used in a dairy to control the vat temperature during the making of Parmigiano-Reggiano; for some reason those factories still employ the Reamur scale.
Curious indeed; I'll like the calibration process (which anyway will be done against a precision centigrade mercury thermometer).