since the end of the 17th century thermoscope The Galileo Project since the end of the 17th century Rice University: The Thermometer thermoscope thermoscope invented by Galileo Galileo designed a basic thermometer thermoscope Rice University: The Galileo Project | Science | Thermometer thermometers http://galileo.rice.edu/sci/instruments/thermometer.html early as 1603 since the end of the 17th century http://galileo.rice.edu/sci/instruments/thermometer.html The Galileo Project - Thermometer since the end of the 17th century