RECORD: Darwin, C. R. n.d. Real angles [diagrams: 5/13, 3/8, 1/3, 1/2]. CUL-DAR51.A25-A27. (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 and William Huxley Darwin.
A25
Real angles
[sketch]
1.
9.
6.
4.
11.
12.
3/
138.46
7.
8.
2.
13.
10.
5.
/over.
A26
3/8°/ 3/8 = 135.°
Real angles
[sketch]
I
4
6.
135°
3.
7.
8.
2.
5.
A27
X
Real angles
( 120°.)
1/3 angle
2 Secondary Spires
[sketch]
(.)
(.) x
(.) 3 . x
(.) 3 2 1X
(.) 3 2 1X
(.) 3 2 1
X x middle x
[right-hand side]
Not a spire in reality
Real Angle
180°
1/2 angle
1 2 secondary spires
[sketch]
2 1
2 1
2 1
2 1
x x
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 28 November, 2025