Although in these two experiments likewise some seeds did not germinate, the figures arrived at already in the previous year were not affected thereby, since each kind of seed gave plants which, as regards their seed, were like each other and different from the others. There resulted therefore from the 2nd Exp. 4th Exp. 31 24 plants of the form _AaBb_ 26 25 " " _Aab_ 27 22 " " _aBb_ 26 27 " " _ab_ In all the experiments, therefore, there appeared all the forms which the proposed theory demands, and also in nearly equal numbers. In a further experiment the characters of floral colour and length of stem were experimented upon, and selection so made that in the third year of the experiment each character ought to appear in half of all the plants if the above theory were correct. _A_, _B_, _a_, _b_ serve again as indicating the various characters. _A_, violet-red flowers. _a_, white flowers. _B_, axis long. _b_, axis short. The form _Ab_ was fertilised with _ab_, which produced the hybrid _Aab_. Furthermore, _aB_ was also fertilised with _ab_, whence the hybrid _aBb_. In the second year, for further fertilisation, the hybrid _Aab_ was used as seed parent, and hybrid _aBb_ as pollen parent. Seed parent, _Aab_. Pollen parent, _aBb_. Possible egg cells, _Abab_. Pollen cells, _aBab_. From the fertilisation between the possible egg and pollen cells four combinations should result, viz.:-- _AaBb_ + _aBb_ + _Aab_ + _ab_. From this it is perceived that, according to the above theory, in the third year of the experiment out of all the plants Half should have violet-red flowers (_Aa_), Classes 1, 3 " " " white flowers (_a_) " 2, 4 " " " a long axis (_Bb_) " 1, 2 " " " a short axis (_b_) " 3, 4 From 45 fertilisations of the second year 187 seeds resulted, of which only 166 reached the flowering stage in the third year. Among these the separate classes appeared in the numbers following:-- Class. Colour of flower. Stem. 1 violet-red long 47 times 2 white long 40 " 3 violet-red short 38 " 4 white short 41 " There consequently appeared-- The violet-red flower colour (_Aa_) in 85 plants. " white " " (_a_) in 81 " " long stem (_Bb_) in 87 " " short " (_b_) in 79 " The theory adduced is therefore satisfactorily confirmed in this experiment also. For the characters of form of pod, colour of pod, and position of flowers experiments were also made on a small scale, and results obtained in perfect agreement. All combinations which were possible through the union of the differentiating characters duly appeared, and in nearly equal numbers.