July 3 – Charles Babbage publishes a proposal for a "difference engine", a mechanical forerunner of the modern computer for calculating logarithms and trigonometric functions. Construction of an operational version will proceed under British Government sponsorship 1823–32 but it will never be completed.[1]
^Crilly, Tony (2007). 50 Mathematical Ideas You Really Need to Know. London: Quercus. p. 85. ISBN978-1-84724-008-8.
^Farish, William (1822). "On Isometrical Perspective"(PDF). Transactions of the Cambridge Philosophical Society. 1: 1–19. Retrieved 2012-05-29.
^Jones, Barclay G. (1986). Protecting historic architecture and museum collections from natural disasters. Ann Arbor: University of Michigan. p. 243. ISBN0-409-90035-4.
^Moorhouse, Charles Edmund (1974). Visual messages: graphic communication for senior students.