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Good Natured in St. Charles: Leech-powered weather forecasting works

Leeches as weather predictors? It could have happened, had George Merryweather been more successful in marketing his Tempest Prognosticator, a fanciful, annelid-powered device. [Swipe left to view photo of the device.] (Photo provided)

Leeches as weather predictors? It could have happened, had George Merryweather been more successful in marketing his Tempest Prognosticator, a fanciful, annelid-powered device. [Swipe left to view photo of the device.] (Photo provided)

Shown in an 1851 essay, the Tempest Prognosticator relied on leeches. (Image provided)