Petunia violacea--offspring of plants self-fertilised for four generations and then crossed by a fresh stock, compared with plants of the fifth intercrossed generation, grown in open ground, in fertility: .. : .. : .. : .. : 54. Nicotiana tabacum--offspring of plants self-fertilised for three generations and then crossed by a slightly different variety, compared with plants of the fourth self-fertilised generation, grown not much crowded in pots, in height: 26 : 63.29 : 26 : 41.67 : 66. Nicotiana tabacum--offspring of plants self-fertilised for three generations and then crossed by a slightly different variety, compared with plants of the fourth self-fertilised generation, grown much crowded in pots, in height: 12 : 31.53 : 12 : 17.21 : 54. Nicotiana tabacum--offspring of plants self-fertilised for three generations and then crossed by a slightly different variety, compared with plants of the fourth self-fertilised generation, grown much crowded in pots, in weight: .. : .. : .. : .. : 37. Nicotiana tabacum--offspring of plants self-fertilised for three generations and then crossed by a slightly different variety, compared with plants of the fourth self-fertilised generation, grown in open ground, in height: 20 : 48.74 : 20 : 35.20 : 72. Nicotiana tabacum--offspring of plants self-fertilised for three generations and then crossed by a slightly different variety, compared with plants of the fourth self-fertilised generation, grown in open ground, in weight: .. : .. : .. : .. : 63. Anagallis collina--offspring from a red variety crossed by a blue variety, compared with the self-fertilised offspring of the red variety: 3 : 27.62 : 3 : 18.21 : 66. Anagallis collina--offspring from a red variety crossed by a blue variety, compared with the self-fertilised offspring of the red variety, in fertility: .. : .. : .. : .. : 6. Primula veris--offspring from long-styled plants of the third illegitimate generation, crossed by a fresh stock, compared with plants of the fourth illegitimate and self-fertilised generation: 8 : 7.03 : 8 : 3.21 : 46. Primula veris--offspring from long-styled plants of the third illegitimate generation, crossed by a fresh stock, compared with plants of the fourth illegitimate and self-fertilised generation, in fertility: .. : .. : .. : .. : 5. Primula veris--offspring from long-styled plants of the third illegitimate generation, crossed by a fresh stock, compared with plants of the fourth illegitimate and self-fertilised generation, in fertility in following year: .. : .. : .. : .. : 3.5. Primula veris--(equal-styled, red-flowered variety)--offspring from plants self-fertilised for two generations and then crossed by a different variety, compared with plants of the third self-fertilised generation: 3 : 8.66 : 3 : 7.33 : 85.