Excerpt from Transactions of the National Dental Association at the Fourteenth Annual Meeting Held at Denver, Colo., July 19-22, 1910, and of the Southern Branch, at the Thirteenth Annual Meeting, Held at Houston, Texas, May 4-6, 1910 The writer, before differentiating between the contraction due to change of state and that due to the contracting solid gold, read pressure control as all being over the con tracting solid gold. 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.