They are 12" on a side and 1 inch thick.
The space between the panes of glass is about 1/2"
I bought one, for about $1.50, and my friend at the reuse hub said" If you want any more you can have them for free"
Apparently they get a lot of them and no one really wants them.
So, what to do with them?
My wife immediately wanted a greenhouse.
I'm down with that,of course, however that is a lot of joints to make, and I don't see it being self supporting without adding some kind of structure.
Also, they have many, but not enough for a full structure.
Any how, what ideas do y'all have for such a thing as this?
There is a way of making greenhouse walls with squares of glass - a friend of mine has boxes of them and described the process, but hasn't built anything. It seems to use metal channels so that each piece of glass sits at a slight angle, with the piece below forcing it outward and the piece above forcing it inward. They jam against each other in such a way as to not require horizontal joins. The overlap of the panes of glass would be only a 1/2" or so from what he said.
Using that as a description, maybe you could find more information on the web? Maybe ask some old-timers, as I don't think I've seen any modern greenhouses built this way.