[4]

18th June Arachis hypogaea tip 8 1/2 inch fr. glass terminal leaflet vertical from gloom of study or shaky stem secured close to base of main petiole

9°. 25'

10 up to the left — leaflet still vertical

10° 45' new dot— secured petiole close behind leading leaflet still vertical

11° 34 to right do.

12. 6 down & to right — not so vertical quite

12. 40 down & to right

1. 37 same course

2. 25 s. do

3  7 do— leaf opening

4 same course do

5 now gone back & up

6° 5 same course

7. 15 do

9. do

10.35 up

19' 6° 40 [sketch]

Used

[4v]

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three or four of the very large pollen-grains are sufficient to fertilise an ovule; but I do not know how many grains a flower produces. With hibiscus, Kölreuter found that 60 grains were necessary to fertilise all the ovules of a flower, and he calculated that 4863 grains were produced by each flower, or 81 times too much. With

[Cross and self fertilisation, p. 377: "With Mirabilis, three or four of the very large pollen-grains are sufficient to fertilise an ovule; but I do not know how many grains a flower produces. With Hibiscus, Kölreuter found that sixty grains were necessary to fertilise all the ovules of a flower, and he calculated that 4863 grains were produced by a single flower, or eighty-one times too many."]