Synopsis
This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is turally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.
Les informations fournies dans la section « Synopsis » peuvent faire référence à une autre édition de ce titre.
Présentation de l'éditeur
The scientific study of the limestones about the western end of Lake Erie was begun almost simultaneously in 1837 by the Ohio and Michigan Geological Surveys, under the direction of Lieutenant W. W. Mather and Dr. Douglass Houghton. Previous to this time many outcrops of these beds had been located by the early settlers and shallow quarries opened from which were obtained building stone and material for lime. The outcrop of the Sylvania sand-rock, north of the Raisin river in Monroe county, Michigan, was known and samples of it had been successfully tested for a high grade glass. The presence of brine in these limestones and in the overlying drift had been discovered by the Indians and early settlers and salt was crudely manufactured at a few localities. In his first geological report, dated January 22, 1838, Hough ton describes these limestones under the heading grey limestone, which he traced in outcrop from the rapids of the Maumee to that of the Raisin, and referred them without doubt to the mountain limestone (C arboniferous) of European geologists.1 He did not separate the dolomitic limestones of the eastern part of this belt from the much purer and geologically younger limestones of the western part. The presence of the Sylvania sandrock was noted and its origin suggested from the adjacent silicious limestones seen along the Raisin river. More detailed study of the strata in Monroe and Wayne counties, Michigan, was assigned to the assistant geologist, Bela Hubbard, and reported upon a year later.2 The Deport of the State Geologist, 3838. Senate document No. 10; p. 7; House document No. 24, p. 281. 2S econd Annual Report of the State Geologist, 1S39. Senate document No. 12, p. 354 ;H ouse document No. 23, p. 470.
(Typographical errors above are due to OCR software and don't occur in the book.)
About the Publisher
Forgotten Books is a publisher of historical writings, such as: Philosophy, Classi
Présentation de l'éditeur
This book was originally published prior to 1923, and represents a reproduction of an important historical work, maintaining the same format as the original work. While some publishers have opted to apply OCR (optical character recognition) technology to the process, we believe this leads to sub-optimal results (frequent typographical errors, strange characters and confusing formatting) and does not adequately preserve the historical character of the original artifact. We believe this work is culturally important in its original archival form. While we strive to adequately clean and digitally enhance the original work, there are occasionally instances where imperfections such as blurred or missing pages, poor pictures or errant marks may have been introduced due to either the quality of the original work or the scanning process itself. Despite these occasional imperfections, we have brought it back into print as part of our ongoing global book preservation commitment, providing customers with access to the best possible historical reprints. We appreciate your understanding of these occasional imperfections, and sincerely hope you enjoy seeing the book in a format as close as possible to that intended by the original publisher.
Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.
