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by Science Source
$25.00
Size
Bottom Style
Image Size
Product Details
Dress it up, dress it down, or use it to stay organized while you're on the go. Our zip pouches can do it all. They're crafted with 100% poly-poplin fabric, double-stitched at the seams for extra durability, and include a durable metal zipper for securing your valuables.
Our zip pouches are available in three different sizes and with two different bottom styles: regular and t-bottom.
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
Spot clean or dry clean only.
Ships Within
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.
$25.00
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