Excerpt from Popular Science Lectures, Vol. 3: Season of 1924-1925, Presented by Members of the Faculty of the Philadelphia College of Pharmacy and ScienceThe third volume of Popular Science Talks, is issued in compliance with requests which have come from many quarters, and in view of the pleasing reception given to the first and second volumes.Especially have these requests come from public libraries and from high schools, Where, in some instances, the books have been used in the chemistry and science reading courses.The lectures which constitute the volume represent the effort of the Philadelphia College of Pharmacy and Science to contribute to the educational welfare of the community at large by means of popular scientific discussions.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.