\yCt^C{..^iyiA^ Jzi-^n^^.'^^ 



ESSAYS UPON HEREDITY 



AND KINDRED 



BIOLOGICAL PROBLEMS 



BY 



Dr. august WEISMANN 



PROFESSOR IN THE UNIVERSITY OF FREIBURG IN BREISGAU 



VOLUME II 



EDITED BY 



EDWARD B. POULTON, M.A., F.R.S., F.L.S., F.G.S. 



AND 



ARTHUR E. SHIPLEY, M.A., F.L.S. 



AUTHORISED TRANSLATION 



AT THE CLARENDON PRESS 



1892 



