Centrolineads are technical drawing tools used to create perspective drawings where one or more of the vanishing points lie outside of the drawing board. Two forms of centrolinead were invented independently by Britons Peter Nicholson and John Farey Jr. in the early 1800s, for which they were both recognised by the Society for the Encouragement of Arts, Manufactures and Commerce in 1814 with twenty guineas and the society's Silver Medal, respectively.[1][2]
- ^ "Papers in Polite Arts". Transactions of the Society, Instituted at London, for the Encouragement of Arts, Manufactures, and Commerce. 32: 67–76. 1814.
- ^ Bradley, Thomas (1834). Practical Geometry, Linear Perspective, and Projection: Including Isometrical Perspective, Projections of the Sphere, and the Projection of Shadows, with Descriptions of the Principal Instruments Used in Geometrical Drawing, &c. ... For the Use of Artists, Architects ... &c. Baldwin and Cradock. pp. 42–43. Retrieved May 26, 2016.