Excerpt from The First Deslandres' Group of the Positive Band Spectrum of Nitrogen, Under High Dispersion: A Thesis Submitted for the Degree of Doctor of PhilosophyVon der Helm gives a complete discussion of relevant previous work on nitrogen, together with the possible results of such an investigation, and the first eight pages of his article could well form the introduction to this paper.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.