The winning question (or, to be accurate, questions) in our Ask the Experts competition has been announced. Congratulations to Richard Ware for soundly testing their knowledge. Just to clarify, the image above is of Galileo, not Richard.
a) How was the first thermometer calibrated?
b) What did Galileo use as a reference? Did he just get his pencil out and start marking the side of the thermometer ""10 ... 20 ... 30 ... 40"" etc?
c) Why did everyone (presumably) accept his findings as pukka? Did anyone query them?