HEREDITARY 

 CHARACTERS 



AND THEIR MODES OF 

 TRANSMISSION 



BY 



CHARLES EDWARD WALKER 



M.Sc., M.R.C.S., L.R.C.P. 



DIRECTOR OF RESEARCH IN THE GLASGOW CANCER HOSPITAL ; FORMERLY 



ASSIST. DIRECTOR OF CANCER RESEARCH IN THE UNIVERSITY 



OF LIVERPOOL ; SOMETIME DEMONSTRATOR IN ZOOLOGY 



ROYAL COLLEGE OF SCIENCE, LONDON 



AUTHOR OF "ESSENTIALS OF CYTOLOGY," ETC. 



LONDON 

 EDWARD ARNOLD 



1910 



(All Rights Reserved) 



