An Introduction to the Study of Spectrum Analysis (Classic Reprint)
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| Partner: | buecher.de |
| Hersteller: | Forgotten Books (Watts, William Marshall) |
| Stand: | 2015-08-04 03:50:33 |
Produktbeschreibung
Excerpt from An Introduction to the Study of Spectrum Analysis Whatever discoveries the century now opening may bring us, there can be no doubt of the enormous advance in scientific knowledge witnessed by the nineteenth century. That one hundred years ago there was no travelling by rail, no electric telegraph, no telephone, no electric or gas lighting, no photography, no chloroform - not to mention such trifles as matches - this shows that no mean advance has been made. But, amongst all the discoveries of the past century, there is none more important - from some points of view, at least - than the discovery of spectrum analysis, by means of which the composition of the sun and stars has been revealed and new elements have been discovered, and which is now the most powerful means we possess of investigating the constitution of matter. Before the discoveries of Bunsen and Kirchhoff no philosopher had ever ventured to think it possible that we should be able to analyze the sun and stars. The idea of its possibility is said to have occurred to these philosophers of Heidelberg on the occasion of a fire at Mannheim, when, looking at the distant conflagration through the newly constructed instrument, they recognized the presence of strontium amongst the burning material, and the thought occurred to them, "If it be possible to recognize a substance by the nature of the light emitted a few miles off, why not also at any distance?" "By the methods which have become possible since 1860 by the introduction into the observatory of the spectroscope and the modern photographic plate, a great harvest has been gathered by many reapers. Spectroscopic astronomy has become a distinct and acknowledged branch of the science, possessing a large literature of its own, and observatories specially devoted to it. The more recent discovery of the gelatine dry plate has given a further great impetus to this modern side of astronomy, and has opened a pathway into the unknown, of which even an enthusiast forty years ago would scarcely have dared to dream. 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.
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