Excerpt from Electrical Novelties: The Ultra Vacuum Electrodes, X-Ray Tubes and Stands, the Multiple Spark Interrupter, Spark Lamp to Produce Violet Rays, Spark Regulator for Coil, Electric Heaters, X-Ray Plates Goods will be delivered f. O. B. Freight or express, Boston, Mass. No charge for packing. Each piece of apparatus is carefully packed and no allowance will be made for loss or breakage in transit. 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.