George has spoiled me soooooo bad. He sent me this 1945 Science and Mechanics, with the Ravenswood article with so much detail in it -- Glass Marbles by the Million, by Bill Random -- and I put the magazine away for "later" before I recognized its significance. Luckily later came today.
Here's the text of the article: http://mm.bglances.com/1-06-05-00%20Ravenswood%20Glass%20Novelty%20Works.htm