Henry reaches the top of the peak and gasps, “Impossible”. Henry reaches the top of the peak and gasps, “Impossible”.

He’s blown away!

An anemometer.
Archival Photograph by Mr. Sean Linehan, NOS, NGS

This little device is called an anemometer.

An anemometer?

Yup, an anemometer! It can spin around and measure wind speed. You can even build your own! What do you think the winds are like at the top of the peak that Henry climbed?