100
Deck prism
(en.wikipedia.org)
Very cool. Never heard of this before.
I wish the article had a picture of one in use
For centuries, sailing ships used deck prisms to provide a safe source of natural sunlight to illuminate areas below decks. 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.
Neat 📸
this post was submitted on 28 Dec 2024
100 points (100.0% liked)
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