Surface Tension and Needle

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“Carefully place a fine sewing needle upon the surface of the water. With care, and perhaps repitition, the needle may be made to float...Closely examine the surface of the water. Notice that the needle rests in a little depression or bed, just as it would if the surface of the water was a thin skin or membrane.” -Avery 1895


Elroy M. Avery School Physics (New York: Sheldon and Company, 1895) 43


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