Here are some spectacles with two built-in lightbulbs, dating from around 1920.
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- RE: (Photos: How the Victorians did gadgets)
- I think air-tight seal was meant rather than vacuum (which also requires an air-tight seal to work) (Read the rest)
- Posted by: cgarrett@... Posted on: 08/18/08 You are currently: a Guest | Log in | Terms of Use
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Osiramon@... | 08/18/08
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RE: (Photos: How the Victorians did gadgets)
bobdozz@... | 08/18/08
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RE: (Photos: How the Victorians did gadgets)
cgarrett@... | 08/18/08
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