Ultraviolet lamp, sun ray, metal, by Hanovia, from Messrs. Englehard Industries, British, 1910-1930 Ultraviolet lamp, Slough, England, 1910-1930 1910-1930
Glass vacuum tube containing mercury, used as element in hospital sun lamp, by Hanovia Lamps of Slough in 1928 Glass vacuum tube used in a hospital sun lamp, Slough, England, 1928 1928
"Monarch" stand magnifier with 153x104mm (aspheric) acrylic lens and ivory-coloured supports 1950-1959
"Raylite 28" distortion-free illuminated hand magnifier with 64mm diameter aspheric acrylic lens 1950-1959