Petunia violacea--second generation: 4 : 40.50 : 6 : 26.25 : 65. Petunia violacea--third generation: 8 : 40.96 : 8 : 53.87 : 131. Petunia violacea--fourth generation: 15 : 46.79 : 14 : 32.39 : 69. Petunia violacea--fourth generation, from a distinct parent: 13 : 44.74 : 13 : 26.87 : 60. Petunia violacea--fifth generation: 22 : 54.11 : 21 : 33.23 : 61. Petunia violacea--fifth generation, in open ground: 10 : 38.27 : 10 : 23.31 : 61. Petunia violacea--Number and average height of all the plants in pots of Petunia: 67 : 46.53 : 67 : 33.12 : 71. Nicotiana tabacum--first generation: 4 : 18.50 : 4 : 32.75 : 178. Nicotiana tabacum--second generation: 9 : 53.84 : 7 : 51.78 : 96. Nicotiana tabacum--third generation: 7 : 95.25 : 7 : 79.60 : 83. Nicotiana tabacum--third generation but raised from a distinct plant: 7 : 70.78 : 9 : 71.30 : 101. Nicotiana tabacum--Number and average height of all the plants of Nicotiana: 27 : 63.73 : 27 : 61.31 : 96. Cyclamen persicum: 8 : 9.49 : 8?: 7.50 : 79. Anagallis collina: 6 : 42.20 : 6 : 33.35 : 69. Primula sinensis--a dimorphic species: 8 : 9.01 : 8 : 9.03 : 100. Fagopyrum esculentum--a dimorphic species: 15 : 38.06 : 15 : 26.13 : 69. Beta vulgaris--in pots: 8 : 34.09 : 8 : 29.81 : 87. Beta vulgaris--in open ground: 8 : 30.92 : 8 : 30.70 : 99. Canna warscewiczi--plants of three generations: 34 : 35.98 : 34 : 36.39 : 101. Zea mays--in pots, whilst young, measured to tips of leaves: 15 : 20.19 : 15 : 17.57 : 87. Zea mays--when full-grown, after the death of some, measured to tips of leaves: : 68.10 : : 62.34 : 91. Zea mays--when full-grown, after the death of some, measured to tips of flowers: : 66.51 : : 61.59 : 93. Zea mays--grown in open ground, measured to tips of leaves: 10 : 54.00 : 10 : 44.55 : 83. Zea mays--grown in open ground, measured to tips of flowers: : 53.96 : : 43.45 : 80. Phalaris canariensis--in pots. 11 : 38.90 : 11 : 35.69 : 92. Phalaris canariensis--in open ground: 12 : 35.78 : 12 : 33.50 : 93. TABLE 7/B.--Relative weights of plants from parents crossed with pollen from distinct plants of the same stock, and self-fertilised. Column 1: Names of plants. Column 2: Number of crossed plants. Column 3: Number of self-fertilised plants. Column 4: x, where the ratio of the Weight of the Crossed to the Self-fertilised Plants is expressed as 100 to x. Ipomoea purpurea--plants of the tenth generation: 6 : 6 : 44. Vandellia nummularifolia--first generation: 41 : 41 : 97. Brassica oleracea--first generation: 9 : 9 : 37. Eschscholtzia californica--plants of the second generation: 19 : 19 : 118. Reseda lutea--first generation, grown in pots: 24 : 24 : 21. Reseda lutea--first generation, grown in open ground: 8 : 8 : 40.