The Dental Summary, 1911, Vol. 31 (Classic Reprint)

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Excerpt from The Dental Summary, 1911, Vol. 31 Before a cast is made the mould contains air, and when the metal is forced into the mould, it must displace the confined air and expel it into the porous investment, where it meets, and offers opposition to and impedes the free expulsion of air from the mould, thereby retarding the ingress of the metal into the mould. 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.