A fire at sea is among a sailor’s worst fears. In the era of wooden shops, where candles and oil lamps were the only sources of illumination, the chance of such a catastrophe was an ever-present ...
A 4½-inch-high heavy glass pyramid was in a recent house sale. It was inexpensive, but no one knew what it was used for. It was almost too heavy to lift, so it wouldn’t be a practical paperweight, but ...
Lighting effects and lasers help bring the entertainment industry to life. High quality optical prisms are one of the key components to this. Knight Optical’s prisms are available in a wide range of ...
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