In 1744 , the year Anders Celsius died , the famous Swedish botanist Carolus Linnaeus ( 1707 â `` 1778 ) effectively reversed Celsiusâ s scale when he received his first thermometer with a scale where zero represented the melting point of ice and 100 represented waterâ s boiling point . In 1744 , coincident with the death of Anders Celsius , the Swedish botanist Carolus Linnaeus ( 1707 â `` 1778 ) reversed Celsius 's scale upon receipt of his first thermometer featuring a scale where zero represented the melting point of ice and 100 represented the boiling point .