The average height of the six self-fertilised children of Hero is 74.54 inches, whilst that of the ordinary self-fertilised plants of the corresponding generation is only 62.58 inches, or as 100 to 84. TABLE 2/15. Ipomoea purpurea. Heights of Plants in inches: Column 1: Number (Name) of Pot. Column 2: Self-fertilised Plants of the Seventh Generation, Children of Hero. Column 3: Intercrossed Plants of the Seventh Generation. Pot 3 : 92 : 76 6/8. Pot 4 : 87 : 89. Pot 4 : 87 6/8 : 86 6/8. Total : 266.75 : 252.50. Here the average height of the three self-fertilised children of Hero is 88.91 inches, whilst that of the intercrossed plants is 84.16; or as 100 to 95. We thus see that the self-fertilised children of Hero certainly inherit the powers of growth of their parents; for they greatly exceed in height the self-fertilised offspring of the other self-fertilised plants, and even exceed by a trifle the intercrossed plants,--all of the corresponding generation. Several flowers on the self-fertilised children of Hero in Table 2/14 were fertilised with pollen from the same flower; and from the seeds thus produced, self-fertilised plants of the eighth generation (grandchildren of Hero) were raised. Several other flowers on the same plants were crossed with pollen from the other children of Hero. The seedlings raised from this cross may be considered as the offspring of the union of brothers and sisters. The result of the competition between these two sets of seedlings (namely self-fertilised and the offspring of brothers and sisters) is given in Table 2/16. TABLE 2/16. Ipomoea purpurea. Heights of Plants in inches: Column 1: Number (Name) of Pot. Column 2: Self-fertilised Grandchildren of Hero, from the Self-fertilised Children. Eighth Generation. Column 3: Grandchildren from a cross between the self-fertilised children of Hero. Eighth Generation. Pot 1 : 86 6/8 : 95 6/8. Pot 1 : 90 3/8 : 95 3/8. Pot 2 : 96 : 85. Pot 2 : 77 2/8 : 93. Pot 3 : 73 : 86 2/8. Pot 3 : 66 : 82 2/8. Pot 3 : 84 4/8 : 70 6/8. Pot 4 : 88 1/8 : 66 3/8. Pot 4 : 84 : 15 4/8. Pot 4 : 36 2/8 : 38. Pot 4 : 74 : 78 3/8. Pot 5 : 90 1/8 : 82 6/8. Pot 5 : 90 5/8 : 83 6/8. Total : 1037.00 : 973.16.