The idea of free republic education as an essential compnent of american democracy grew in the early nineteenth century with the influence of

The idea of free public education was an essential component of American democracy grew in the early nineteenth century with the influence of Thomas Jefferson and Horace Mann.

For reasons of economy and the constraints of 18th-century engineering technology, the early canals were built to a narrow width. The standard for the dimensions of narrow canal locks was set by Brindley with his first canal locks, those on the Trent and Mersey Canal in 1776.