How a barometre works...

please use this video to assist your understanding how how a barometre works and to do your technical analysis of the device.

http://science.discovery.com/tv-shows/deconstructed/videos/deconstructed-barometer.htm

Expect this assignment to be due at the end of next week (around Nov 30th)... if you have questions, then please ask us during the next few days :D