Maritime Museum of BC, 2019.010.0001
Here is an antique working barograph, known as “The Prip.” This was used by sailors to help chart changes in atmospheric pressure.This would help them avoid storms, and know when storms were coming. Connected to a pressure-sensitive element, the goes up and down. Rather than an individual snapshot, this creates a timeline graph of the atmosphere. This would help sailors track the air pressure, and even avoid storms.