What is the history of 32 Fahrenheit?
I believe Fahrenheit was German. The scale was set with zero as the coldest temperature he could get in his lab (before refrigeration). This was done by mixing ice and salt. I’ve heard that body temperature was set either at 100 or at 96 to make scale division easier. Once the two points were set, the freezing and boilng points of water were measured on the scale to be around 32 and 212. At some point, the scale was redefined to exactly 32 and 212 for water rather than the original basis.