X-ray apparatus, miniature lamps and accessories
A 1902 trade catalogue from the Bario Vacuum Co. of New York, listing X-ray tubes, miniature incandescent lamps and fittings for physicians, dentists and electrical supply dealers. The plates are small halftone and line engravings of individual glass bulbs and tubes, screw bases and filament loops rendered in dense stipple against blank grounds, useful as isolated object silhouettes and early electrical iconography.
