Historical Anemometer Diagram - How Early Wind Speed Instruments Worked #3763247 (License: Personal Use)

This engraved illustration depicts a classic U-tube anemometer, where wind entering the open tube (B) creates pressure that displaces liquid in the vertical graduated column (C), allowing wind speed estimation via the height difference. The device relies on Bernoulli’s principle and was commonly used in early meteorological stations before electronic sensors. The scale alongside column C enables quantitative readings based on fluid displacement.

Used in educational or historical science web pages discussing the evolution of weather instruments; targets users researching meteorology history, physics demonstrations, or antique scientific apparatus. Matches intent for academic, museum, or STEM outreach content.