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Lava lamps An original Mathmos Astro lava lamp A lava lamp is a decorative lamp , invented in 1963 by British entrepreneur Edward Craven Walker , the founder of the lighting company Mathmos . It consists of a bolus of a special coloured wax mixture inside a glass vessel, the remainder of which contains clear or translucent liquid.
Before electricity, light below a vessel's deck was provided by candles, oil and kerosene lamps—all dangerous aboard a wooden ship. The deck prism laid flush into the deck, the glass prism refracted and dispersed natural light into the space below from a small deck opening without weakening the planks or becoming a fire hazard.
Glass ingots Approximately 175 glass ingots of cobalt blue, turquoise, and lavender were found (earliest intact glass ingots known). Chemical composition of cobalt blue glass ingots matches those of contemporary Egyptian core-formed vessels and Mycenaean pendant beads, which suggests a common source.
Dragonfly Lamp, c. 1900 Brooklyn Museum A Tiffany Studios Daffodil leaded glass table lamp (shade shown), designed by Clara Driscoll. While doing research for a book on Tiffany at the Queens Historical Society, Gray found the historically valuable letters written by Driscoll to her mother and sisters during the time she was employed at Tiffany.
Radioluminescent 1.8-curie (67 GBq) 6-by-0.2-inch (152.4 mm × 5.1 mm) tritium vials are tritium gas-filled, thin glass vials with inner surfaces coated with a phosphor. Tritium radioluminescence is the use of gaseous tritium , a radioactive isotope of hydrogen , to create visible light.
Cobalt glass—known as "smalt" when ground as a pigment—is a deep blue coloured glass prepared by including a cobalt compound, typically cobalt oxide or cobalt carbonate, in a glass melt. Cobalt is a very intense colouring agent and very little is required to show a noticeable amount of colour.