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    Re: Comparison, Pan of Oil vs Mirror Artificial Horizon
    From: Paul Dolkas
    Date: 2015 Jun 23, 23:47 -0700

    At $100/lb, Mercury is much, much cheaper than the “non-toxic” substitute alloy that they now use for thermometers (“Galinstan”).

     

    Paul Dolkas

     

    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Gary LaPook
    Sent: Tuesday, June 23, 2015 10:37 PM
    To: paul@dolkas.net
    Subject: [NavList] Re: Comparison, Pan of Oil vs Mirror Artificial Horizon

     

    Anybody can buy mercury but it ain't cheap. I bought mine more than 40 years ago and I don't remember what I paid for it. Frank might remember the Science Center on Northwest Highway (long gone) in Chicago where I bought mine. I have about a half pound and I would consider that as the minimum because it doesn't make a very large puddle so the field of view is limited, a pound would be much better.

     

    Here is a source for it today:

    http://www.mcssl.com/store/gallium-source/025---mercury-metal

     

    We have discussed the use of mercury many time in the past and you might find them interesting, for example:

    http://fer3.com/arc/m2.aspx/Making-an-artificial-horizon-Huxtable-jan-2011-g15358

    http://fer3.com/arc/m2.aspx/Mercury-artificial-horizons-Hazards-Hazards-Morris-dec-2013-g26055

    http://fer3.com/arc/m2.aspx/Childrens-landlocked-Sextant-LaPook-nov-2007-g4166

     

    gl

     




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