[18]

Abstract Dec 12 75

(Nicotiana)

1st great cross— crossed seeds to s-fert. seeds. 100 : 150

5 tallest crossed. to 5 s-fert 100 : 189

when full-grown 100 : 178

In crowded pot (twice tried) = equal (twice tried)

show some advantage in crossing

4 crossed & self- plants in 4 separate pots all 4 self from 2-4 inches taller than crossed

2d Generation

crossed seeds to s-f. 100 : 97

Height counted 100 : 96

3 crossed & self-fert in separate pots 100 to 106.

3d Generation A & B — self-fertile by one of crossed plants

crossed seeds seemed less numerous than self-seeds so not intercrossed

A 7 crossed to 7 self-fer 100 : 100 83

B do. do 100 : 101 (so they certainly seem to have different constitution)

Crosses by fresh stock — seeds not increased.

[18v]

Case like Pea & Sweet p I do not know history of my plants, but probably cultivated [illeg] self-fertile & if grown in Glass House not crossed—

From the great difference in the several experiments I think the sexual rule state of the reproductive elements must differ in the several individual plants — Kolreuter.