This illustrated a lecture about basic principles of geometry. Turner copied it from Euclid's 'Elements of Geometry' but made a mistake in the title - it shows triangles inside circles, not circles inside triangles. A copy of Euclid with Turner's annotations (no.153) is displayed in a showcase.
Gallery label, September 1992
Does this text contain inaccurate information or language that you feel we should improve or change? We would like to hear from you.