I never bought from any of those three, I didn’t have the money.
Wait, I did order from Edmund Scientific. There was an article, I think in National Geographic, about about “printing” snowflakes. The kit was from Edmund Scientific. This was about 1970. I made a rare order, and 6-8 weeks later, when I’d given up, it arrived.
I don’t remember using it, I can’t remember why. Something years later made me think it was mostly Crazy Glue, the snowflake leaving a pattern before melting.
But all those catalogs, and others, provided long hours of reading.
