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Excerpt from The Prodromus of Nicolaus Steno's Dissertation Concerning a Solid Body Enclosed by Process of Nature Within a Solid: An English Version With an Introduction and Explanatory Notes Tm: task of preparing this translation of Steno's Prodromus has been lightened by the generous help of several of my colleagues in the University of Michigan. To Professor W. H. Hobbs I am indebted for suggesting the work and for reading the entire manu script, as well as for contributing a Foreword. Professor E. H. Kraus read in manuscript the section dealing with crystallography, and Professor E. C. Case gave helpful suggestions in questions of palaeontology. A point in physics was clarified by Professor W. D. Henderson. 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.