Thermometers might seem like a basic instrument, but science would not be the same without them, and they helped us understand one of the most important ideas in all of science: the conservation of energy.
Crash Course – History of Science: https://www.youtube.com/watch?v=-hjGgFgnYIA&list=PL8dPuuaLjXtNppY8ZHMPDH5TKK2UpU8Ng
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Sources:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4360093/
https://royalsocietypublishing.org/doi/10.1098/rstl.1850.0004
https://royalsocietypublishing.org/doi/10.1098/rspl.1837.0140
https://www.aps.org/publications/apsnews/200912/physicshistory.cfm
https://www.sciencedirect.com/science/article/abs/pii/0039368194000369
https://www.jstor.org/stable/18233
http://galileo.phys.virginia.edu/classes/152.mf1i.spring02/Joule.htm
https://books.google.com/books?id=6lBFAAAAcAAJ&pg=PA80#v=onepage&q&f=false
https://royalsocietypublishing.org/doi/abs/10.1098/rstl.1804.0009
Images:
https://en.wikipedia.org/wiki/File:Joule_James_sitting.jpg
https://www.istockphoto.com/photo/usb-overcklock-digital-thermometer-and-voltage-gm916024344-252075793
https://commons.wikimedia.org/wiki/File:Faraday_disk_generator.jpg
https://en.wikipedia.org/wiki/File:Joules_Apparatus_(Harpers_Scan).png
https://en.wikipedia.org/wiki/File:Vintage_image_of_steam_train.jpg
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