A remarkable book on weather forecasting was published just one hundred years ago. Written by the brilliant and prescient applied mathematician, Lewis Fry Richardson, Weather Prediction by Numerical Process  was published by Cambridge University Press and went on sale in 1922 at a cost of 30 shillings (£1.50). With a print run of just 750 copies, it was not a commercial success and was still in print thirty years after publication. It was re-issued in 1965 as a Dover paperback. Cambridge University Press reprinted the book in 2007, with a foreword by Peter Lynch. Described as a second edition, it differs in no essential way from the 1922 edition.