RECORD: Darwin, C. R. June 10. I painted with vermilion wax edge of comb. CUL-DAR48.B29. Edited by John van Wyhe (The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed and edited by John van Wyhe 6.2025. RN1
NOTE: Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volume CUL-DAR48 contains notes for Natural selection chap. 8 'Transitions of Organs'. Notes on bees' cells for origin of species theory.
B29
June 10' I painted with vermilion wax edge of comb & looked to day at 12° (11th) considerably added to the colour was diffused over several cells in diffused manner like water colour darkest in angles where wax not removed.— On new But edge colour was orange, showing that this had been worked up with some vermilion — & I could see grains of ver. throughout whole thickness.— 12th In another spec with built edge removed & most thoroughly edged with vermilion: colour diffused over about bases of 1 ½ cells, but more in single row of rhombs.
June 12. a level-topped knife-edged ridge of red wax was eaten into near edge with deep saucers & the bees had worked alternately on 2 sides & when various came into contact, there were transparent windows inclined after each other at angles; so thus it is no theory that they can excavate to equal depth on opposite sides of ridge
This ridge was .35 exactly high.— I may state positively that ribbon not laid down regularly along margin without regard to basal rhomb. of cell — for today I saw a [sketch] rectangular bend corresponding to change in plane of rhomb by bases of a cell.—
B29v
June 13 one hexagon cell which I edged with indigo — colour dfifused all round (Board no 17) the neighboring cells — showing diffusion of work
In this comb, 17 the one edge rather thickly done with indigo wax shows band of indigo generally along middle planes of rhombs its 2 or 3 exceptions may be due to particles irregularly spilt on com — but also diffused. On edge of this comb in 17 there was the most extraordinary zig-zags of like this
[sketch] next day (14) this outline wall all lost
13' I see in arching over comb from below to above slide they have elongated hexagon thus How wd bases be?
[sketch]
(Case of bottom formed of hexagon, pentagon & irregular short or quadrilateral fig a convex base certainly became flat & seemed to be much too thin to be possibly capable of being gnawed — I found after warming with breath can easily be bent to be convex, but apt to crack, Huber saw what he thought were cells gnawed through.
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 13 June, 2025