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Our greeting cards are 5" x 7" in size and are produced on digital offset printers using 100 lb. paper stock. Each card is coated with a UV protectant on the outside surface which produces a semi-gloss finish. The inside of each card has a matte white finish and can be customized with your own message up to 500 characters in length. Each card comes with a white envelope for mailing or gift giving.
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A Welsh coal miner's safety lamp. The safety lamp evolved from a need to prevent the numerous fatal mining accidents of the late eighteenth century... more
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A Welsh coal miner's safety lamp. The safety lamp evolved from a need to prevent the numerous fatal mining accidents of the late eighteenth century that were caused by explosions of methane/air mixtures ignited by the flames of miners' candles. Sir Humphrey Davy's original design was a simple oil burner enclosed in wire gauze cylinder. The heat of the flame was effectively contained by conduction through the wires of the gauze, whose temperature never rose to the ignition point of the methane/air mixture. A later modification (shown here) possessed a thick glass window around the flame and a brass shroud surrounding the upper gauze to protect it from damage.
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