RECORD: Darwin, C. R. n.d. Not Real [angles with diagrams]. CUL-DAR51.A10-A14. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed and edited by John van Wyhe. RN1
NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library & William Huxley Darwin.
A10
not real
1/4 = 90°
3 Secondary spires.
& 4 Secondary spires
4 3 2 1
4 3 2 1
4 3 2 1
4 3 2 1
x x
[sketch]
A11
Not real
1/5 = 72
not real
4 secondary spires. & 5 secondary spires
with symmetrical one in middle
[sketch]
x x
5 4 3 2 1
5 4 3 2 1
5 4 3 2 1
x middle x
A12
Not real angle
1/6 = 60°
5 secondary spires
& 6 secondary spires
[sketch]
6 5 4 3 2 1
6 5 4 3 2 1
6 5 4 3 2 1
x x
A14
Two proper secondary
3/7 = 154.285
False angle
[sketch]
3 2 1
8 7 6
5 4
3 2 1
8 7 6
5 4
3 2 1
x middle x
Two proper secondary spires
4/9 False angle = 160°
[sketch]
5 4
3 2 1
10 9 8
7 6
5 4
3 2 1
x middle x
A14v
(False angles)
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 28 November, 2025