Joseph Mallord William Turner

Lecture Diagram: Three Equilateral Triangles

c.1817–28

In Tate Britain

Prints and Drawings Room

View by appointment
Artist
Joseph Mallord William Turner 1775–1851
Medium
Graphite and watercolour on paper
Dimensions
Support: 584 × 869 mm
Collection
Tate
Acquisition
Accepted by the nation as part of the Turner Bequest 1856
Reference
D16998
Turner Bequest CXCV 28

Catalogue entry

Made in connection with Turner’s lectures as Professor of Perspective at the Royal Academy, this diagram of three equilateral triangles is related to sketches in his notes, which suggest that he used it, along with another diagram of triangles numbered ‘1’ and ‘2’ (Tate D16996), in later lectures on geometry.1
1
Turner, ‘Royal Academy Lectures’, circa 1807–38, Department of Western Manuscripts, British Library, London, ADD MS 46151 W folios 2, 4.
Technical notes:
Peter Bower (unpublished notes)1 writes that the sheet is Colombier size Whatman paper made by William Balston, at Springfield Mill, Maidstone, Kent.
1
Notes in Tate catalogue files.
Verso:
Blank, save for an inscription by an unknown hand in pencil ‘8’ bottom left.

Andrea Fredericksen
January 2004

Supported by The Samuel H. Kress Foundation

Revised by David Blayney Brown
January 2012

Read full Catalogue entry

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