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Thread: Admiral Fitzroy’s Storm Glass

  1. #1 Admiral Fitzroy’s Storm Glass 
    Forum Radioactive Isotope zinjanthropos's Avatar
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    https://en.m.wikipedia.org/wiki/Storm_glass

    Found the exact one pictured in the Wiki article in an old unopened closet box. Someone must have bought us one long ago and we never knew until couple days ago. It’s a combination of certain chemicals inside a tube that crystallize according to outside weather conditions as far as I know. Surely crystals are not a subject totally misunderstood by science but it seems that there’s a bit of a mystery as to how the concoction within the glass works.

    I find that hard to believe. So one question is if there are more than one mix of chemicals that mimics the solution in the glass? Another question, are there natural forming crystals affected by the outside weather conditions? If so, how?


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    Time Lord Paleoichneum's Avatar
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    It seems to be pretty simple based on whats in the wiki article. As the temp of the concoction decreases, minerals precipitate out as crystals, as the temp increases the crystals redissolve, with no relation to weather


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    Forum Radioactive Isotope zinjanthropos's Avatar
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    Quote Originally Posted by Paleoichneum View Post
    It seems to be pretty simple based on whats in the wiki article. As the temp of the concoction decreases, minerals precipitate out as crystals, as the temp increases the crystals redissolve, with no relation to weather
    Found this http://www.edu.utsunomiya-u.ac.jp/ch.../Jong3112t.pdf

    Confirms what you said. Best used for a thermometer. Amazing that people couldn’t figure that out for many years. Poor Fitzroy thought he had the ultimate weather forecasting device. Back in the box it goes. This device reminded me of when I had a chemistry set long ago and I let some mixture sit in a glass for awhile ..... it crystallized at room temperature.

    So is crystallization dependent on temperature? Or only if in solution?
    All that belongs to human understanding, in this deep ignorance and obscurity, is to be skeptical, or at least cautious; and not to admit of any hypothesis, whatsoever; much less, of any which is supported by no appearance of probability...Hume
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  5. #4  
    Samurai of Logic Falconer360's Avatar
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    Even though it is basically just a thermometer, it's still a cool conversation piece.
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    Bullshit Intolerant PhDemon's Avatar
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    Solubility depends on temperature so the amount of stuff dissolved and the amount of stuff in crystals changes with temperature. Generally things dissolve better if it is warmer, so under warm conditions the liquid would be clear, as the temperature cools, solubility decreases and crystals start to appear.

    Also if it was open to the atmosphere the humidity would also play a role.
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