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A Large Rotating Vane Anemometer for Measuring Wind Force and Velocity. A Fine old brass anemometer, 15 cm (6 inch) in diameter, unnamed with serial No. 1327 and with four dials graduated in feet, Hds, Thds and 10Thds. It was used to count the number of linear feet of air that have passed the instrument during its exposure time, and calculate velocity. Contains an integral brass sandglass for timing 1 minute. The dial’s cover glass has a small corner crack. Otherwise it is in good working condition. |
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