Excerpt from The Mechanism and Physiology of Sex Determination Scientific investigation in the field of sex determination and heredity is now being pursued with great vigour in many countries, and there is every prospect of great success in the future in the elucidation and probably the actual control of sex. The German edition of the work was dedicated by Gold schmidt to Professor Richard Hertwig. If it were possible for me to dedicate the English translation it would be to the memory of the late Professor Leonard Doncaster, whose classic work is so often referred to within its pages, and whose untimely death robbed us of one whose name will always be associated with the problem of the inheritance and determina tion of sex. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.