"Albert Michelson's Harmonic Analyzer " celebrates a nineteenth century mechanical calculator 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. One hundred and fifty color photos reveal the analyzer's beauty though full-page spreads, lush close-ups of its components, and archival photos of other Michelson-inspired analyzers. The book includes sample output from the machine and a reproduction of an 1898 journal article by Michelson, which first detailed the analyzer. The book is the official companion volume to the popular YouTube video series created by the authors.