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Darwin, Charles, 1809-1882

"Effects of Cross and Self Fertilisation in the Vegetable Kingdom"


Pot 1 : 43 6/8 : 0.
Pot 2 : 38 4/8 : 54 4/8.
Pot 2 : 47 4/8 : 47 4/8.
Pot 2 : 0 : 32 5/8.
Pot 3 : 54 7/8 : 46 5/8.
Pot 4 : 32 1/8 : 41 3/8.
Pot 4 : 0 : 29 7/8.
Pot 4 : 43 7/8 : 37 1/8.
Pot 5 : 46 6/8 : 42 1/8.
Pot 5 : 40 4/8 : 42 1/8.
Pot 5 : 43 : 0.
Pot 6 : 48 2/8 : 47 7/8.
Pot 6 : 46 2/8 : 48 3/8.
Pot 7 : 48 5/8 : 25.
Pot 7 : 42 : 40 5/8.
Pot 8 : 46 7/8 : 39 1/8.
Pot 9 : 49 : 30 3/8.
Pot 9 : 50 3/8 : 15.
Pot 9 : 46 3/8 : 36 7/8.
Pot 9 : 47 6/8 : 44 1/8.
Pot 9 : 0 : 31 6/8.
Crowded Plants.
Pot 10 : 46 4/8 : 47 7/8.
Pot 10 : 35 2/8 : 0.
Pot 10 : 24 5/8 : 34 7/8.
Pot 10 : 41 4/8 : 40 7/8.
Pot 10 : 17 3/8 : 41 1/8.
Crowded Plants.
Total : 1078.00 : 995.38.
The average height of the flower-stems on the twenty-five crossed plants
in all the pots taken together is 43.12 inches, and that of the
twenty-five self-fertilised plants 39.82, or as 100 to 92. In order to
test this result, the plants planted in pairs in Pots 1 and 8 were
considered by themselves, and the average height of the sixteen crossed
plants is here 44.9, and that of the sixteen self-fertilised plants
42.03, or as 100 to 94. Again, the plants raised from the thickly sown
seed in Pots 9 and 10, which were subjected to very severe mutual
competition, were taken by themselves, and the average height of the
nine crossed plants is 39.


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