Here you can find a scanned article (thanks, Gary!) and two links to old articles from the "Mechanix illustrated". Enjoy!
Thanks to Gary - without him, most of these articles wouldn't be here! Of course, if you have any information about slingshots, shoot me an email and I'll be happy to put it on this page
I know, it violates copyright law to scan articles and publish them without permission. But the articles are around 50 years old, and it is impossible to find the author or his next to kin, and the magazine which published it ceased to exist, too. I don't think these scans do damage to anyone's business. If you hold the copyrights and wish me to remove them, I'll do so immediately.