24 



Mr. Francis Galton on 



than one stock could be reared, descended from the same 

 original pair of moths, but in different places, in order 

 that the male and female pupae may be occasionally 

 interchanged and the moths cross bred, by which the 

 evils of too close interbreeding would be diminished. I 

 sincerely hope that any practical entomologist who may 

 be disposed to further these experiments will communi- 

 cate with me at 42, Rutland Gate, London, S.W., or 

 with Mr. Merrifield. 



APPENDIX. 



ON THE PROPOSED METHOD OF DEALING WITH THE OBSERVATIONS. 



After the results of the experiments have heen obtained they 

 will be treated by me in somewhat the same minute and technical 

 way that the data I now possess were treated in the memoirs 



L.. 



already referred to. It may perhaps be well to give here a brief 

 and partial account of the guiding principles. 



