What 15 Groundbreaking Inventions Looked Like When They First Came Out

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Before electric refrigerators, “iceboxes” were made of wood and filled with ice.

Iceboxes used various materials to keep the ice frozen and the food inside cool, including cork, tin, zinc, sawdust, and seaweed. In 1835, Jacob Perkins patented a refrigerator with a liquid ammonia vapor-compression cycle.

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  1. Carrie Thompson says

    S was really neat to see, thank you! I think kids should see it, and hopefully will be amazed at it all, and not bored.

  2. Carrie Thompson says

    Is there a way to shar this, please! I think it is very interesting . Thanks!

  3. Carrie Thompson says

    Oh, yay! I got it! It worked when I copied the search bar link. Thank you!

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