Celsius never devised nor used the scale that now bears his name.
Veritasium is now on Patreon: http://patreon.com/veritasium
Special thanks to Michael Stevens of Vsauce! http://youtube.com/vsauce1
More info about Celsius and temperature scales: http://wke.lt/w/s/2I6Nu
References for this video:
A History of the Thermometer and its uses in Meteorology by W. E. Knowles Middleton
Absolute Zero and the Conquest of Cold by Tom Shachtman
The Science of Measurement, A Historical Survey by Herbert Arthur Klein
Lehrbuch der Chemie by Jöns Jakob Berzelius
Special Thanks to the Uppsala University Museum
I filmed this in Uppsala in the summer of 2012! So I've been thinking about this idea for a very long time. I'm glad to finally have it out there in the world.