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Excerpt from Thesis: A Study of the "Grid" Structure in Certain Strong Spectrum LinesAppearance Nutting has called it the grid. The cause of this structure has presented so interesting a problem that Kent has devoted considerable time to it. The following is a summary of his results-obtained with the assistance of Mr. H. E. H. Greenleaf and later of Dr. Lucy Wilson and the writer-which lead directly to the work undertaken in this paper under Kent's guidance.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.