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  #1  
Old 2015-05-10, 9:20am
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jillybead jillybead is offline
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Question What is this?



What is this? Two are thin, the lower one is quite thick, works like a magnifying glass.. It was in a scientific glasd lowers shop I bought out several years ago. My guess is an older type of polariscope?? But why the extra lenses?
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Old 2015-05-10, 12:38pm
LarryC LarryC is offline
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They dont look like they have any polarized coating at all so they cant be from a polariscope unless they are secondary lenses. Not sure what they are.
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Old 2015-05-10, 1:45pm
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Thanks Larry,, I am puzzled..large ones measure 5" across....I have figured out almost everything I bought but these. The mystery continues...
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Old 2015-05-10, 1:47pm
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Three Muses Glass Three Muses Glass is offline
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They could be from the kind of polariscope that has separate tint plates on a swing arm. Like this one-


I looked through one at Urban, that thing was huge, but I don't remember exactly how it worked. I have more of a polarized film and cheap light box budget. lol
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Old 2015-05-10, 3:42pm
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That looks promising . Makes sense to me!
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Old 2015-05-10, 10:01pm
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I remember seeing those used as lids when boiling off gases out of liquids.

you put the curved side down and as the gas condenses on it the droplets run down the curve and fall back into the boiling liquid instead of with normal curved upwards lids where the condensate runs to the out side edge and pours on to the counter when you open the top.

This keeps acids from dribbling out side the containers and creating a hazard.
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Old 2015-05-11, 4:16am
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Default Gizmos

They are from outer space!
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Old 2015-05-11, 1:20pm
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I think I just have a cool heavy magnifier!
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Old 2015-05-19, 3:07pm
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Big kaleidoscope lenses???????
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Old 2015-05-19, 4:40pm
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Clearly they're contact lenses for Cylops.
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Old 2015-05-26, 5:29am
gmarv gmarv is offline
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without a better picture I,m just guessing,but they look like a watch glass.used in a laboratory to set on top of different size beakers.
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Old 2015-06-01, 11:54am
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A friend of mine just dismantled an OLD "big screen" TV and he found some glass lenses in them that looked a lot like what you are showing.

-BEP
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