Excerpt from Variation in Animals and PlantsThe measurement of correlation - Calton's function - Cor relation between various organs ih man, in local races of the shrimp, and in crabs - Comparison between primitive and civilised races of man - Correlation between morpho logical characters and the reproductive system - Genetic Selection in man - Especial fertility of type forms in cer tain plants - Evolution in the Peppered moth - Parallel variation - Importance of mathematical treatment of varia tion.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.