RECORD: Darwin, C. R. [1875-1876]. Draft of Cross and self fertilisation, folio 129. CUL-DAR63.66r. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 12.2022. RN1
NOTE: Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin.
Draft is in the hand of Ebenezer Norman with corrections by Darwin. The text of the draft corresponds to Cross and self fertilisation, p. 70.
129
129
Mimulus
have shown in the following table.
Table 18. (seventh generation)
No. of Pot |
Crossed plants |
Self-fertd. plants |
I |
11. 2/8 11 7/8 |
19 1/8 18 |
II |
12 6/8 11 2/8 |
18 2/8 14 6/8 |
III |
9 6/8 11 6/8 |
12 6/8 11. |
|
68 |
93 |
The average height of the six crossed was now is here 11.43; and that of the six self-fertilised 15.64; or as 100 to 137.
As it was now evident that the tall white variety transmitted its characters faithfully, to its offspring and would probably always exceed in height & as the self-fertilised plants consisted exclusively of this variety, it was manifest that they would always exceed in height the crossed plants which belonged chiefly to the original shorter variety, it seemed useless to continue This line of experiment was therefore discontinued, & I tried therefore whether, intercrossing two self-fertilised plants of the sixth generation, growing
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 9 October, 2023