
Fahrenheit to Celsius: History of the Thermometer is an eight minute overview of the evolution of thermometers and their units of measurement. The video begins with an introduction to the earliest attempts to measure temperature before progressing into the work of Daniel Gabriel Fahrenheit and Anders Celsius. The video explains how Fahrenheit settled on his standards for the freezing and boiling points of water. The video also explains how Anders Celsius did the same and why his original scale is the opposite of what we read on Celsius thermometers today.
The History of the Barometer is a TED-ED lesson that explains how a barometer works and how it was developed. The majority of the video is spent on explaining how the work of Galileo and Evangelista Torricelli contributed to how we measure barometric pressure today.