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Excerpt from The Influence of Density of Gas on the Formation of Corona: Dissertation It was shown by Ryan1 that for the one size of conductor which he used the critical intensity is a linear function of the pressure from 40 to 90 cm. Of mercury. A similar relation was shown to hold for variations with temperature between 21 and 93 deg. Cent. Watson published a set of experiments2 in 1909 showing a linear relation between pressure and critical intensity for the case of continuous voltage. His range of pressure was from 36. To 76 cm. Of mercury and of size of conductor from to cm. He also gave curves showing the amount of current passing. In the earlier papers of this series numerous curves were given showing a linear relation between critical intensity and pressure from 38 to 100 cm. The conductors used ranged in diameter from to cm. Some experiments were also made showing a linear relation between critical intensity and temper ature. Only one size of conductor was used; The range of temperature was from 8 to 41 deg. Cent. 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.