A cyclograph (also known as an arcograph) is an instrument for drawing arcs of large diameter circles whose centres are inconveniently or inaccessibly located, one version of which was invented by Scottish architect and mathematician Peter Nicholson.[1][2][3]
- ^ Nicholson, Peter (1852). Lomax, Edward; Gunyon, Thomas (eds.). Encyclopædia of Architecture. Vol. I. New York: Johnson, Fry & Co. p. 220.
- ^ "Cyclograph". The Free Dictionary. Retrieved 1 February 2011.
- ^ Webster, Roderick S.; Webster, Marjorie K. (2007). "The Webster Signature Database". Adler Planetarium & Astronomy Museum. Retrieved 1 February 2011.