Book Description

Excerpt from The American Journal of Science, Vol. 50 Although the matter has been under consideration and discussion for a number of years, the genetic relationship between the earlier members of the uranium family of radio-elements is still a matter of considerable uncertainty. It is generally conceded that both ionium mid actinium are products of the radioactive disintegration of uranium, but the exact point of origin of actinium and its immediate parentage have remained somewhat obscure and uncertain. He work of Boltwood on the relative ray activity of uranium minerals and the uranium which they contained demonstrated a constancy of relationship between the radioactive constituents of the older minerals and clearly indicated a close genetic relation between uranium and actinium. 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.