J.M.W. Turner: Sketchbooks, Drawings and Watercolours

ISBN 978-1-84976-386-8
J.M.W. Turner > 1802-18 Academician and professor > Perspective lectures c.1809-28 > III. Diagrams after Samuel Cunn's ... > Artwork

Joseph Mallord William Turner Lecture Diagram: 'Euclid's Elements of Geometry', Plane Trigonometry, Proposition 10 c.1817-28

Joseph Mallord William Turner, ‘Lecture Diagram: 'Euclid's Elements of Geometry', Plane Trigonometry, Proposition 10’ c.1817-28
Joseph Mallord William Turner 1775–1851
Lecture Diagram: ‘Euclid’s Elements of Geometry’, Plane Trigonometry, Proposition 10 circa 1817–28
D17104
Turner Bequest CXCV 133
Pencil and watercolour on white wove paper, 490 x 692 mm
Watermarked ‘J WHATMAN | TURKEY MILLS | 1817’
Inscribed by Turner in red and black watercolour over pencil with various initial letters within diagram
Inscribed by John Ruskin in red ink ‘133’ bottom right
 
Accepted by the nation as part of the Turner Bequest 1856
Prepared in connection with his lectures as Professor of Perspective at the Royal Academy, Turner’s diagram is based on an illustration from Samuel Cunn’s Euclid’s Elements of Geometry (London 1759, Plane Trigonometry). It illustrates Proposition 7 on Plane Trigonometry, which Cunn defines as ‘Theorem. Let the arcs A B, B C, C D, D E, E F, & be equal; and let the subtenses of the arcs A B, A C, A D, A E, & be drawn; then will A B: A C::A C : A B + A D: : A D : A C + A E : : A E : A D + A F : : A F : A E + A G’.1 There are sketches of the Proposition in Turner’s lecture notes.2
1
Cunn 1759, pp.285–8.
2
Turner, ‘Royal Academy Lectures’, circa 1807–38, Department of Western Manuscripts, British Library, London, ADD MS 46151 X folios 19, 27.
Technical notes:
Peter Bower states that the sheet is Super Royal size Whatman paper made by Finch and Thomas Robert Hollingworth, at Turkey Mill, Maidstone, Kent.1
1
Notes in Tate catalogue files.
Verso:
Blank, save for an inscription by an unknown hand in pencil ‘127’ bottom left.

Andrea Fredericksen
June 2004

Supported by The Samuel H. Kress Foundation

Revised by David Blayney Brown
January 2012

How to cite

Andrea Fredericksen, ‘Lecture Diagram: ‘Euclid’s Elements of Geometry’, Plane Trigonometry, Proposition 10 c.1817–28 by Joseph Mallord William Turner’, catalogue entry, June 2004, revised by David Blayney Brown, January 2012, in David Blayney Brown (ed.), J.M.W. Turner: Sketchbooks, Drawings and Watercolours, Tate Research Publication, December 2012, https://www.tate.org.uk/art/research-publications/jmw-turner/joseph-mallord-william-turner-lecture-diagram-euclids-elements-of-geometry-plane-r1136729, accessed 21 November 2024.