Excerpt from Controlling Sex in Generation: The Physical Law Influencing Sex in the Embryo of Man and Brute, and Its Direction to Produce Male or Female Offspring at Will; With an Appendix of Corroborative Proofs The first is, after a sufficient number of relevant facts are collected, to deduce from them some general principle which will fit them all. When this is found, the idea takes the position of a hypo thesis, more or less probable as the facts considered have been many in number and sufficiently varied. The second stage is, when well-authenticated facts derived from other persons can be brought to corroborate the hypothesis, especially such facts as were gathered for some different purpose. When these are sufficient to satisfy the honest intelligent reader the evolution of the idea should be regarded as complete, and what was before but a hypothesis be permitted to take rank as a theory. 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.