Présentation de l'éditeur :
This volume is the outgrowth of a series of talks which the author has for several jears given to his students at the Institute ofT echnology, the hearers being members of the senior class sjjeciahzing in chemistry, and hence famihar with its more important facts and principles. The lectures have dealt in a direct informal way with the fundamental ideas of the science: their origin, their philosophical basis, the critical periods in their development, and the personalities of the great men whose efforts have contributed to that development. Put in book form the material has inevitably been somewhat expanded, and just as inevitably its presentation has assumed a more formal tone, without, it is hoped, losing all its spontaneity. Here, as before, the person addressed is the more mature student of chemistrj-, though it is beheved that few portions of the book will present serious difficulties to the general reader. The aim has been to emphasize only those facts and influences which have contributed to make the science what it is today; hence such topics as the chemical achievements of the ancients and the history of alchemy have been compressed beyond the point which the tastes and inclinations of the Titer might alone have dictated. In the dbcussion of later work, also, the claim of a topic for consideration has been not its practical but its historical importance. It has been asked, not whether the work was itself of value, but did it contribute anew fundamental idea. For this reason, to cite a single instance, the work of Werner on the metal-ammonias has been discussed at some length, while that of Emil Fischer on the sugars has been dismissed with a single word. Some modern topics, also, hke the work of Werner just mentioned, or that of Bragg upon X-ray spectra have been treated in considerable detail because they he outside the field familiar to most under
(Typographical errors above are due to OCR software and don't occur in the book.)
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.