A device that measures temperature, barometric pressure, wind speed, and altitude is used daily within the group. The device is called a Windwatch. To get an accurate reading for wind-speed the tool must be held into the wind, in a reasonably clear open space.
We use the Windwatch so that we can record daily data of the criteria being measured above, and post it on the Internet. We also use them so that we can compare results to previous results for our own personal interest.
Feed your children wheat. Joshua.