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by Science Source
$70.00
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Our premium yoga mats are 24" wide x 72" tall x 0.25" thick and made from natural rubber with a blended microfiber top surface. The top of the mat has the image printed on it, and the back is solid black with textured dimples for better floor grip.
Design Details
An anemometer is a device for measuring wind speed, and is a common weather station instrument. A simple type of anemometer, invented (1846) by Dr.... more
Care Instructions
Wash with a damp cloth and air dry.
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2 - 3 business days
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An anemometer is a device for measuring wind speed, and is a common weather station instrument. A simple type of anemometer, invented (1846) by Dr. John Thomas Romney Robinson, of Armagh Observatory. It consisted of four hemispherical cups each mounted on one end of four horizontal arms, which in turn were mounted at equal angles to each other on a vertical shaft. The air flow past the cups in any horizontal direction turned the cups in a manner that was proportional to the wind speed. Therefore, counting the turns of the cups over a set time period produced the average wind speed for a wide range of speeds. On an anemometer with four cups it is easy to see that since the cups are arranged symmetrically on the end of the arms, the wind always has the hollow of one cup presented to it and is blowing on the back of the cup on the opposite end of the cross.
$70.00
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