The book, Albert Michelson's Harmonic Analyzer: A Visual Tour of a Nineteenth Century Machine That Performs Fourier Analysis, is available as a free PDF download at www.engineerguy.com/fourier.
The mechanistic universe of Newton held sway for nearly three centuries till 1887 when two physicists Albert Michelson and Edward Morley pronounced that the speed of light was constant, no matter how fast the observer was travelling.