Réaumur to Newton

Réaumur (°Ré): The Réaumur scale has the freezing point of water at 0 °Ré and the boiling point at 80 °Ré. It was popular in parts of Europe in the 18th and 19th centuries, particularly in France and Germany.

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.