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 11
[N6] CATALOGUE O F NOVELTIES … Spark Lamp to Produce UltraViolet Rays The little lamp shown inthe cut above is not a mere play-thing, although it is small andof low price. Lamps of thissort have been in use abroad forseveral years, and good resultshave been obtained from themin cases of lupus, epithelioma, erysipelas, eczema,…
Electric apparatus and appliances · X-rays · Electrical Equipment and Supplies
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