http://www.robertwhite.com/cgi-local/shop.pl?type=item&item=rba-precision111&categ=rw_brassdial&nav_bar=weather
Meassures the rising and falling of the atmospheric pressure.
air pressure
air pressure and weather
high and low pressure
pressure systems
high pressure systems and weather
low pressure systems and weather
atmospheric pressure and wind
wind
Coriolis Effect
land/sea breeze
what causes wind
http://www.youtube.com/watch?v=YxH1xiNirhA&feature=player_embedded
http://www.ussartf.org/blizzards.htm