Excerpt from A Study of the Absorption Spectra: Of Solutions of Certain Salts of Potassium, Cobalt, Nickel, Copper, Chromium, Erbium, Praseodymium, Neodymium, and Uranium as Affected by Chemical Agents and by TemperatureEu, the component Of the electric force in the y direction, is the only com ponent of the electric force that has a value. The magnetic force has a component only in the z direction, Hz. A is the amplitude of the disturb ance, t is the time, n is the number of vibrations in a time 27: and c is the velocity of light.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.