no THE MENDEL JOURNAL 



APPENDIX. 



Added February, 1909. 



Note to p. 68. — By " Genetics " is understood that 

 branch of Biology which studies the phenomena of 

 heredity. Quite recently, owing in part to a redis- 

 covery of Mendel's generalisation and in part to the 

 large and increasing volume of experimental evidence 

 in corroboration of it, the study of heredity has now 

 for ever emerged from the chaos which marked its 

 previous condition. An appeal to accurately con- 

 ducted experiments is the soundest and safest method 

 by which the problems of heredity can be solved. 

 It may be urged, indeed has often been urged, that 

 we cannot apply the experimental method to man. 

 But so far as he is concerned, experiments on a vast 

 scale have already been performed. It is not the 

 want of experiment that we lack, but the proper and 

 accurate recording of the results. Blue eye with 

 blue eye, brown eye with brown eye, and brown eye 

 with blue eye have been mated together in numbers 

 that dwarf our most colossal experiments — even 

 those of Prof. Bateson with an offspring of twelve 

 thousand five hundred chicks — and yet the only 

 accurate analysis and record of these facts which 

 has been made is that by Mr. Hurst of quite recent 

 date. North American Indians and negroes have 

 been crossed with Europeans many hundreds of times 

 and their progeny have intermarried and been 

 married back to the original European or coloured 

 stock still more frequently, and yet nowhere is there 



