![Evangelista Torricelli experimenting in the Alps with a barometer, 1643. [Illustration] Ernest Board, Wikimedia](https://dev.alpinist.com/wp-content/uploads/2023/09/a71-tool-users-barometer-1-930x620.jpg)
Tool Users: Barometer
What’s a glass instrument measuring four feet long and filled with mercury doing in your rucksack? In this Tool Users story from Alpinist 71, Caroline Schaumann and Bruce Willey reveal the history of the glass barometer.
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Caroline Schaumann and Bruce Willey