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Craigslist oddity -- Vintage Optical Device Made By Leitz - $25

Horicon Marsh-5

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Horicon Marsh-5

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Millstone, High Water

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Millstone, High Water

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  • Dec 17, 2025
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Pretty sure it's as you've said some sort of lamphouse. I had a ancient projection microscope, university surplus, had carbon arc light with a wound spring clock like drive that would slowly advance the electrodes for the lamp. I never had the nerve to plug it in.

There was even a chamber that would hold a glass miniature "aquarium like" cell to observe living creatures.

I thought it might have been used to demonstrate to a small class in a darkened room.

$100 digicam will do this today. Boring.

Of course it's probably something else entirely 🙄
 
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