Democratic Sentinel, Volume 16, Number 45, Rensselaer, Jasper County, 25 November 1892 — All Happens in a Second. [ARTICLE]

All Happens in a Second.

A second is the smallest division of time in general use, and when )ve consider that in one year there arc about 31,558,000 of these periods it toould certainly seem as if it was small enough for all practical purposes. But after all a good deal can happen even In a fraction of a second. A light wave, for instance, passes through a distance of about 185,000 miles in this length of time. A current of electricity has probably an even greater speed. The earth itself moves in its orbit at a rate of about twenty miles a second, thus far exceeding the fastest railroad trains on its surface. A tuning fork of the French standard vibrates 870 times per second to produce the note A on the treble staff.—Popular Science News.