Rømer to Newton

Rømer (°Rø): The Rømer scale was an early scale invented by Ole Christensen Rømer. It defined the freezing point of water as 7.5 degrees and the boiling point as 60 degrees. It was a direct influence on the Fahrenheit scale.

Newton (°N): The Newton scale was devised by Isaac Newton around 1700. It used the freezing point of water as 0 and the boiling point as 33. It is considered a direct predecessor to the Celsius scale.