“I have no recollection of what I used these for,” circa 1918-20

I’m at a conference the rest of the week and will return on Monday. In the meantime here’s something for y’all to ponder. I have no idea what they could be either and all I can add is that whatever they are, they weigh very little:

Bonus: You can see almost all the history of chemistry at Rice from this window.

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3 Responses to “I have no recollection of what I used these for,” circa 1918-20

  1. Richard Schafer says:

    My guess would be they are simply tags that would be attached to shop equipment to identify it as belonging to the shop.

  2. G Mixon says:

    If they have a number on the flip side, I would say they are tool chips. Assigned to a specific person or lab and used when tools are checked out of the “tool crib”.

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