Peter Nicholson (20 July 1765 – 18 June 1844) was a Scottish architect, mathematician and engineer.
Largely self-taught, he was apprenticed to a cabinet-maker but soon abandoned his trade in favour of teaching and writing.
He practised as an architect but is best remembered for his theoretical work on the skew arch (he never actually constructed one himself), his invention of draughtsman's instruments, including a centrolinead and a cyclograph, and his prolific writing on numerous practical subjects.
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