Excerpt from On the Impregnation of the Ovum in the Amphibia It is to these questions that this communication which I have now the honour of laying before the Royal Society is chiefly directed. I propose first to show the time and mode of disappearance of the germinal vesicle, and the condition Of the ovum in the Frog and Newt, immediately before and after impregnation, and to endeavour to supply proof from actual experiments that the spermatozoa alone, in all cases of com munion of the sexes, are the sole agents in impregnating the ovum and further, that impregnation cannot be effected by the liquor seminis; and next to examine in what way the agency of the spermatozoa is influenced, impeded, or exerted. 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.