Excerpt from The Theory of Light, Vol. 1 of 3: A Treatise on Physical Optics A special feature of the work is the careful comparison between theory and experiment at every stage. From our standpoint as to the aim of science, such a comparison appears all-important. The one difficulty in this matter has been to get access to the most accurate and recent experimental results; a difficulty arising entirely from the present isolation of the writer. At the ends of the earth there are no great libraries to which to refer, and the procuring of material from 'home' is tedious and uncertain. In dealing with experimental results I have deliberately refrained from entering upon descriptions of the methods of experiment as, in my judgment, quite out of place in such a work as this. 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.