This introduction to the series Albert Michelson’s Harmonic Analyzer celebrates a nineteenth century mechanical computer that performed Fourier analysis by using gears, springs and levers to calculate with sines and cosines—an astonishing feat in an age before electronic computers. Check out the series companion book and learn how to get a free PDF of the entire book at <a rel="nofollow" class="external free" href="http://www.engineerguy.com/fourier">http://www.engineerguy.com/fourier</a>.
<a href="//commons.wikimedia.org/w/index.php?title=User:Hammack&amp;action=edit&amp;redlink=1" class="new" title="User:Hammack (page does not exist)">Willam S. Hammack</a>
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