Friday Find: The barocyclonometer, a hurricane detection relic from an age of

The barocyclonometer consists of two parts, a barometer and a cyclonometer. The barometer (bottom) could alert a ship’s captain that a hurricane or cyclone was coming based on changes in atmospheric (or barometric) pressure. Then, the captain could set the cyclonometer’s moveable parts and use mathematical formulas and tables to determine where the center of the storm was and what direction it was heading.

There’s a description in a 1913 Popular Mechanics magazine. One for sale here.


Algue wrote a guide to using the barocyclonometer - The Cyclones of the Far East. There’s a searchable copy here.