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Thread: What is this antique thing?

  1. #1
    W K Longcor
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    What is this antique thing?

    I have reached a point in my life where I need to simplify and downsize. Been going through my old (antique) camera stuff to see what I might want to part with, and found this. It came to me with some camera/darkroom equipment. I have no idea what it is. Anybody got any ideas? I thought maybe some sort of hydrometer. But, in plain water, it floats with about 1/3 of the ball above the surface. Comes in a beautiful turned wooden case. Scale is hand etched 1 through 12. Then again it might not be photographic in nature at all!
    Attached Thumbnails Attached Thumbnails IMG_6830.jpg   IMG_6833.jpg  

  2. #2
    Vaughn's Avatar
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    Re: What is this antique thing?

    My guess is that it measures the density of the liquid it is in -- with the number relating to specific densities.
    "Landscapes exist in the material world yet soar in the realms of the spirit..." Tsung Ping, 5th Century China

  3. #3

    Re: What is this antique thing?

    Yes, it looks like a hydrometer. I have a similar looking one. Pretty, but hard to use compared to current glass models.

  4. #4

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    Re: What is this antique thing?

    With the linear scale, it might have been made for a specific product...

    Steve K

  5. #5

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    Re: What is this antique thing?

    I could be wrong, but I think that's a dingle arm from a Turbo Encabulator.

  6. #6

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    Re: What is this antique thing?

    I seem to recall you could use a hydrometer to check your fixer, but maybe I'm just confused. It might also be useful for gum bichromate.

  7. #7
    Tin Can's Avatar
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    Re: What is this antique thing?

    Very common not that long

    Chemists of all types had many

  8. #8

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    Re: What is this antique thing?

    Hmmm...I think you've hit the nail on the head - that what you have in an antique...thing!

  9. #9
    Maris Rusis's Avatar
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    Re: What is this antique thing?

    If that hydrometer floats high in water it is calibrated for a liquid of a lower specific gravity. It could be for ethanol which in its pure form has a SG of 0.79.
    Photography:first utterance. Sir John Herschel, 14 March 1839 at the Royal Society. "...Photography or the application of the Chemical rays of light to the purpose of pictorial representation,..".

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