Modulators were used throughout Britain from the mid-19th century onwards, primarily to help teach singing to children.The Englishman, the Reverend John Curwen (1816-1880), adapted his tonic sol ...

The impact of milk on general life expectancy was perhaps first studied by John Christian Curwen (1756 – 1828). A 1825 book by J. Harding reports Curwen’s studies in the town of Kendal which ...