Peter Mark Roget (1779 1869), of Huguenot stock, trained as a physician in Edinburgh and London, yet he was increasingly drawn to the sciences, corresponding with Erasmus Darwin, Thomas Beddoes and Humphry Davy. He practised medicine (free of charge) in London at the Northern Dispensary, which he co-founded, and lectured on physiology and medical topics. His Bridgewater Treatise, on animal and vegetable physiology, is also reissued in the Cambridge Library Collection. Roget is remembered today for the present work, first published in 1852 following his retirement from professional duties. As...