336 APPENDIX 



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, Ab,ab. Pollen cells, aB,ab. 



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 fol- 

 lowing: 



There subsequently appeared 



The violet-red flower-colour (Aa) in 85 plants. 

 " white " " (a) in 81 " 



" long stem (Bb) in 87 " 



" short " lb) 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 pos- 

 sible through the union of the differentiating characters duly 

 appeared, and in nearly equal numbers. 



