The twenty-one Westerham-crossed plants weighed 32 ounces; the
twenty-two intercrossed plants, 34 ounces, and the twenty-one
self-fertilised plants 7 1/4 ounces. The following ratios are calculated
for an equal number of plants of each kind. But as the self-fertilised
plants were just beginning to wither, their relative weight is here
slightly too small; and as the Westerham-crossed were still growing
vigorously, their relative weight with time allowed would no doubt have
greatly increased.
The Westerham-crossed plants in weight to the self-fertilised as 100 to
22.
The Westerham-crossed plants in weight to the intercrossed as 100 to
101.
The intercrossed plants in weight to the self-fertilised as 100 to 22.3.
We here see, judging by weight instead of as before by height, that the
Westerham-crossed and the intercrossed have an immense advantage over
the self-fertilised. The Westerham-crossed are inferior to the
intercrossed by a mere trifle; but it is almost certain that if they had
been allowed to go on growing for another month, the former would have
completely beaten the latter.
As I had an abundance of seeds of the same three lots, from which the
foregoing plants had been raised, these were sown in three long parallel
and adjoining rows in the open ground, so as to ascertain whether under
these circumstances the results would be nearly the same as before.
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