Présentation de l'éditeur
As in previous editions, we have kept before us the adaptation of this book to the needs of the beginner. There have been incorporated all advances that we regard as fundamental to an understanding of the accepted principles and practices of modern bacteriology. Opinion is now well stabilized upon the matter of variations in bacterial species and the subject has been treated in appropriate places in both a general and particular manner. Since the last edition of this book there have been developed methods for the estimation of the exact acid or alkaline strengths of solutions. These methods are based upon the theory of dissociation of electrolytes under different conditions of solution. They are now so simplified as to make them adaptable to the routine estimation and correction of reactions of culture media. In this connection an effort has been made to explain the phenomenon of dissociation in such manner as to make it comprehensible to those not versed in the physics of solutions, and to clarify the steps, and reasons therefor, taken in efforts to determine the reactions of solutions, especially of culture media, by the estimation of their hydrogen-ion content. The significance of pH values as symbols of reaction and the use of indicators for different pH values is explained.
(Typographical errors above are due to OCR software and don't occur in the book.)
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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.
