Title:-Electrical Novelties: the Ultra Vacuum Electrodes, X-ray Tubes and Stands, the Multiple Spark Interrupter, Spark Lamp to Produce VAuthor:-Company, Boston Swett & LewisFormat:-Paperback / softbackPublisher:-Legare Street PressPublisher Date:-09/09/2021Pages:-32Genre:-Nonfiction, Technology & Engineering, Electricity, ISBN13:-9781014139245Condition:- BRAND NEW