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 (1903)
Swett & Lewis Company, Boston · Boston : Swett & Lewis Company · leaf 10
]V«»16 N9I4 … [N6] CATALOGUE O F NOVELTIES
Electric apparatus and appliances · X-rays · Electrical Equipment and Supplies
Internet Archive · Medical Heritage Library · Public Domain Mark 1.0. Free to use for anything.
