Publisher's Synopsis
Excerpt from Smithsonian Contributions to Knowledge, Vol. 29
I employ small blown vessels of Bohemian glass, with flat bottoms, such as are found in trade. I choose them of the same dimensions, or nearly so, which can easily be ascertained by fitting together their edges and noting whether they have nearly the same external diameter. It is not necessary to carry accuracy any farther, considering all the inevitable irregularities connected with measurement. 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.
