Download or read book Cantor Lectures on Photography and the Spectroscope Classic Reprint written by William De Wiveleslie Abney and published by Forgotten Books. This book was released on 2018-01-05 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Cantor Lectures on Photography and the Spectroscope It often happens that a second patch of white light, comparable to that formed, is te quired. Advantage is taken of the fact that from the first surface of the first prism P', a certain amount of light is reflected. Placing a lens. L5, in the path of this reflected beam, and a mirror, G, another square patch of light can be thrown on the same screen as that on which the first is thrown, and this second patch may be made of the same size as the first patch if the lens, L5, be of suitable focus, and it can be superposed over the first patch if required. We have now a square white patch upon the screen, from the te-combination of the spectrum. If I wish to diminish the bright ness of this patch, there are at least two ways in Which I can accomplish it. First, by closing the slit of the collimator, and, second, by the introduction of rotating sectors, M, which can be Opened and closed at pleasure during rotation in the path of the beam. 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.
Download or read book Cantor Lectures on Photography and the Spectroscope written by William De Wiveleslie Abney and published by Palala Press. This book was released on 2018-03 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book Cantor Lectures on Photography and the Spectroscope written by Sir William de Wiveleslie Abney and published by . This book was released on 1885 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book Handy Lists of Technical Literature Useful arts in general products and processe used in manufacture technology and trades 1889 and Key to publishers Z7911 H13 pt 2 Military and naval science with list of non technical books illustrating soldier and sailor life 1890 and Key to publishers Z6721 H13 pt 2a Electricity and magnetism 1899 and Key to publishers Z5831 H13 pt 3 Engineering and mechanics 1890 and Key to publishers Z5851 H13 pt 4 Mines and mining mineralogy geology etc 1891 and Key to publishers Z6736 H13 pt 5 6 Fine arts and architecture 1893 Z5931 H13 written by and published by . This book was released on 1889 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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