Excerpt from Lessons in Chemistry Some substances are capable of existing in the three possible states, as solid, liquid, and gas. Water is the most common example of such a substance; by the action of more or less heat it can be converted at pleasure into steam, liquid water, or ice. However, if we strongly heat a piece of wood or some sugar, these substances will not be melted into liquids or changed to vapor, but will be transformed into entirely different kinds of matter, from which'we cannot again obtain the original substance. 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.