The squaw of the hippopotamus : Pythagoras's theorem -- Shortening the proceedings : logarithms -- Ghosts of departed quantities : calculus -- The system of the world : Newton's law of gravity -- Portent of the ideal world : the sqaure root of minus one -- Much ado about knotting : Euler's formula for polyhedra -- Patterns of chance : normal distribution -- Good vibrations : wave equation -- Ripples and blips : Fourier transform -- The ascent of humanity : Navier-Stokes equation -- Waves in the ether : Maxwell's equations -- Law and disorder : second law of thermodynamics -- One thing is absolute : relativity -- Quantum weirdness : Schrödinger equation -- Codes, communications, and computers : information theory -- The imbalance of nature : chaos theory -- The Midas formula : Black-Scholes equation