Excerpt from Some Experiments With Coupled High Frequency Circuits Corps buzzer of the 1905 type excited by two storage' cells with a regulating resistance and key in series. The oscillatory circuit which is connected around the break of the buzzer consisted of a variable air condenser C1, having a maximum capacity of microfarads and an inductance L1 of 20 turns of no. 20 wire wound in a coil of approximately 10 cm diameter.4 The value of this inductance was millihenrys. This circuit, when the buzzer was properly adjusted, gave out very feebly damped oscillations, the logarithmic decrement, when no extra resistance was introduced, being between 1 and 2 percent. 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.