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Excerpt from High School Chemistry: Revised Edition The object of this chapter is to illustrate the various kinds of changes and apparent changes which matter may undergo. 1. - Physical Change. Experiments. 1. Heat a piece of platinum wire in the flame of a spirit lamp or gas burner. 2. Fill a test-tube full of water and invert it over a tumbler or beaker half-full of water, as in Fig. I. Heat the upper end with a spirit lamp until steam forms, and then allow the test-tube to cool. 3. Hold a rod of hard glass in a gas flame until it becomes red hot, then pull the ends of the rod apart After cooling can you observe any change in the properties of the glass at the place where it was heated? 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.