Excerpt from Gleanings in Science: A Series of Popular Lectures on Scientific Subjects I have endeavoured to supply, in some measure, the place of Experiments, by means of'iilustrations introduced into the text. Some of these Illustra tions represent instruments or apparatus of histo rical interest which are already familiar to the scientific public; but most of them have been spe cially drawn, for the present work, from the apparatus used in my own Experiments. I am in debted to the kindness of Mr. Whymper for the four woodcuts which illustrate the last Lecture in the Volume, and which are taken from his well-known and attractive Scrambles amongst the Alps. 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.