°F

 Daniel Gabriel Fahrenheit was a polish merchant who had a fascination in natural science, mostly about temperature. Following his fascination, he went to Germany to study physics and thermometry. After settling as a glassblower, he conducted an experiment to remove alcohol from the thermometer and replace it with mercury. Being the first to invent the in-glass mercury thermometer, he also developed a scale to follow it known as degrees Fahrenheit. Keeping his invention to himself for almost 18 years, once made public he was elected to the Fellows of the Royal Society and degrees Fahrenheit has been used to measure temperature in Europe since then until the 19th century.