interestingly, Celsius' original proposal was for a scale which is the same as the one we use today, except that it was in reverse - so 100 degrees for freezing, 0 degrees for boiling, and higher number means colder. Later, when the system we use today was proposed, the name "Centigrade" was originally proposed, but that was already taken for the angle 1/100 of a right angle (which in turn was a result of the move towards decimalisation post-French Revolution, where a right angle was briefly 100 gradians). So they weren't allowed to call it Centigrade and so named it after Celsius even though his one was the other way round