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OK, so another charity shop donation today.
These are 3.25" square plates, each with a positive image on them. They seem to date back quite a way looking at the clothing of the people in them. I have around 50-100 of these including some really odd stuff... I brought a handful home to scan and research.
Some are in colour, some black & white. They are positive transparencies, not negative. There is quite a bit of Harrogate in there. I scanned some and put them on a Flickr album if anyone is interested here: https://www.flickr.com/photos/harlequin565/albums/72177720316333723
At first I thought they were glass plate direct photos of some sort, but on discovering some that were hand drawn and others in colour, I thought they might be magic lantern slides. But the magic lantern slides I'd seen weren't photo-realistic, and came in long slides with 3 or 4 photos in them.
I'm guessing they are for an early projector, but no clue what sort. I'm also terrible at history and am not really able to date them. One of the photos I scanned had a bit of paper attached to it with a note stating "inhalation of radioactive gas". And another was apparently showing "Ionisation". Odd photo content for someone to project at a dinner party or whatever - although my hard drive would be just as random.
So my question to the wiser and more educated folks...
What are they? Can they be dated - either by the content, or by the technology (my guess 30s - 40s)? And does anyone think they are worth anything? eBay shows sales of them, but at low prices so it'll probably be a job lot, but they seem to be a weird collection of images with no rhyme or reason to them.
Your thoughts most appreciated!
These are 3.25" square plates, each with a positive image on them. They seem to date back quite a way looking at the clothing of the people in them. I have around 50-100 of these including some really odd stuff... I brought a handful home to scan and research.
Some are in colour, some black & white. They are positive transparencies, not negative. There is quite a bit of Harrogate in there. I scanned some and put them on a Flickr album if anyone is interested here: https://www.flickr.com/photos/harlequin565/albums/72177720316333723
At first I thought they were glass plate direct photos of some sort, but on discovering some that were hand drawn and others in colour, I thought they might be magic lantern slides. But the magic lantern slides I'd seen weren't photo-realistic, and came in long slides with 3 or 4 photos in them.
I'm guessing they are for an early projector, but no clue what sort. I'm also terrible at history and am not really able to date them. One of the photos I scanned had a bit of paper attached to it with a note stating "inhalation of radioactive gas". And another was apparently showing "Ionisation". Odd photo content for someone to project at a dinner party or whatever - although my hard drive would be just as random.
So my question to the wiser and more educated folks...
What are they? Can they be dated - either by the content, or by the technology (my guess 30s - 40s)? And does anyone think they are worth anything? eBay shows sales of them, but at low prices so it'll probably be a job lot, but they seem to be a weird collection of images with no rhyme or reason to them.
Your thoughts most appreciated!