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Updated: May 19, 2025
Now, in my case, the versed sine that is to say, the thickness of the segment beneath me was about equal to my elevation, or the elevation of the point of sight above the surface. 'As five miles, then, to eight thousand, would express the proportion of the earth's area seen by me. In other words, I beheld as much as a sixteen-hundredth part of the whole surface of the globe.
A wire suspending thirty-nine pounds being twisted ninety-five full turns lengthened itself one sixteen-hundredth of its length. Being further twisted by twenty-five turns it shortened itself one fourth of its previous elongation. During the twisting some sections took far more torsion than others.
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