RECORD: Darwin, C. R. 1877.08.05-09.17. Bilberries / Proof sheet of Cross and self fertilisation. CUL-DAR66.142. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 3.2023. 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.

The volume CUL-DAR66 contains notes on 'bloom'. Francis Darwin explained: "His researches into the meaning of the 'bloom,' or waxy coating found on many leaves, was one of those inquiries which remained unfinished at the time of his death. He amassed a quantity of notes on the subject". LL3: 339. See an Introduction to these folders by Christine Chua & John van Wyhe.


[142]

Aug 5. 9˚ 30'

5 cleaned in 1/4 oz of distilled water & 5 uncleaned. The latter float higher.

N. B Bloom not very perfect, — look silvery when submerged. — Seem to vary in amount of bloom.

Aug 7 all the cleaned ones are now shrunk

Means of distribution!

Aug 8' 7˚ P. m The fluid with the cleaned berries decidedly Pink.

[142v]

Aug. 5' / 77/ Bilberries

9˚. cleaned 12 10 berries & 12 10 uncleaned syringed

Aug. 14th punctured 1 of each no difference in colour of juice

― 16' 8˚ squashed 3 of each; juice of one of the cleaned of a brown tint.

25th a pair of each kind squashed & one of each was of proper colour & one discoloured. (no mark made below)

Sept 17. cut open the 3 remaining of each kind, see stain behind — no difference between them worth speaking of— after a time juice of both became pink.— It is surprising how long they keep full of juice, as were some of those cut open today, ie 1 month & 12 days.

Aug' 5. 9˚ 10 cleaned & 10 uncleaned to dry.

Aug 6' 7˚ 30 Am. signs of those with bloom shrivelling a little

Aug 8'. 8˚ no plain difference in shrivelling

14 — do do do

21 Frank cut open one of driest of each but no difference

24' F. remarks cleaned berries still feel damp, but are certainly more wrinkled than those with bloom.

27 Cut open smallest on each side that with bloom rather less ripe & equally dry or cleaned one rather dampest

Sept 1 The cleaned ones certainly more shrunk & wrinkled; but when all cut open, very little difference in juice— Perhaps those with bloom rather more. (over)


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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 5 July, 2023