DEPARTMENT OF APPLIED MATHEMATICS, 



UNIVERSITY COLLEGE, UNIVERSITY OF LONDON 



DRAPERS' COMPANY RESEARCH 



MEMOIRS 



BIOMETRIC SERIES. III. 



MATHEMATICAL CONTRIBUTIONS TO THE THEORY 



OF EVOLUTION.-XV. A MATHEMATICAL 



THEORY OF RANDOM MIGRATION, 



BY 

 KARL PEARSON, F.R.S. 



WITH THE ASSISTANCE OF 



JOHN BLAKEMAN, M.St. 



[With Seven Diagrams.] 



LONDON: 

 PUBLISHED BY DULAU AND CO., 37, SOHO SQUARE, W. 



1906 



Price Five Shillings 



