RECORD: Darwin, C. R. [1878].09.24-26. Dionaea / Draft of Cross and self fertilisation. CUL-DAR209.3.162-163. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and John van Wyhe, edited by John van Wyhe 12.2022. RN2

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. The volume CUL-DAR209.3 contains materials for Darwin's book Movement in plants (1880).

Draft is in the hand of Ebenezer Norman with corrections by Darwin. The text of the draft corresponds to Cross and self fertilisation, pp. 51 and 49.


[162]

Vertical Glass Dionæa — Old Leaf

Sept 24' Fresh leaf— filament fixed externally

8°. 5' first dot

8 . 48' risen a bit & to left

9 40 same spot

10. 30 .— do

 

10 . 33' (depressed by weight) infusion of meat

10 . 34' dot & outline of spike each vied in front

—  38 I think closing ??

11. 45. same spot— leaf not at all closed ( X )

12. 40. risen an atom

12 45 ⨀. put on more infusion. — weight caused slight fall

}

1 . 45 risen an atom on rising

2 . 35 an atom higher

4°. up & to right

6 — . do

 

no doubt only the

cly of leaf

Used

 

7 . 10' still up — can this be owing to drying of fluid?

7. 15 new dot (because slided glass —

8 30 same spot

10 50 up & to left

25'. 6. 45' a.m. down during night

8° 5 up & to right

9. 5 right down— I think meat for made  circumnutation

10 . 25  up & to R

11 . 45 a little to right

1 35 to right & down

3° up straight

4 to right & down

5. 5' to right & up— The Cots are now closing & spikes turned The zig-zaging indicates nutation in & this causes the great lateral movement

[162v]

[top of page excised]

intercrossing two of the grandchildren [text excised] any more than when two of the children of Hero were inter crossed. It appears therefore that Hero together with & its descendants have varied from the common type, not only in acquiring great power of growth and increased fertility, when subjected to self-fertilisation, but in not profiting from a cross with a distinct family; and this latter fact, if trustworthy, is a unique case, as far as I have observed.

11.33' an Hour alm 7 1/3 inch

[163]

25th continued Dionæa — Old Leaf

25th continued

5°. quickly)

7. 20 . same course

8. 48 to right & little up (almost closed)

9. 45 vertically down

10. 45 up & to right— Spikes intercrossed—

2 6 7 the 6° 55' a . m — perfectly closed

7 . 3.5 up.

8 . 30 little to right   

— to 8 . 55 . nearly same spot

End of leaf 8½ from vertical glass

Length of Leaf

at 9° Put under sky light

Used

[163v]

Ipomoea

two sets of seedlings (namely self-fertilised and the offspring of brothers and sister), is given in the following Table.

Table 16.

No. of Pot

Self-fert. Grandchildren from the self-fert. children of Hero. Eight generation

Grandchildren from a cross between the self-fert children of Hero. Eighth generation

I

86 6/8

90 3/8

95 6/8

95 3/8

II

96

77 2/8

85

93

III

73

[excised]

86 2/8

82 [excised]

 


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Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)

File last updated 20 December, 2025