History of thermometer By taylornw Jan 1, 1593 Gelileo Thermoscope Jan 1, 1612 Santorio Thermoscope Jan 1, 1612 Mouth Thermometer Jan 1, 1654 Ferdinand II Thermometer Jan 1, 1714 Fahrenheit Thermemeter Jan 1, 1724 Fahrenheit Scale Jan 1, 1742 Celscus Scale Jan 1, 1848 Kelvin Scale Jan 1, 1867 Medical Thermometer Jan 1, 1984 Ear Thermemeter