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This republication of 'Use of the Ulbricht Sphere in Measuring Reflection and Transmission Factors,' originally published in 1921 as part of the Scientific Papers of the Bureau of Standards, offers a detailed examination of the Ulbricht sphere’s application in optical measurements. Authored by E. Karrer, Scientific Paper 415 (S415) from Volume 17 (p. 203-225) presents methodologies for accurately determining reflection and transmission factors using this integrating sphere. This work is invaluable for researchers and practitioners in physics, optics, and industrial technology, providing insights into measurement techniques that remain relevant in contemporary scientific analysis. This historical document provides both context and practical information for those interested in the evolution of optical measurement technology.This work has been selected by scholars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.
