Golden Book of Chemistry Experiments Scan: this book has been banned, like so many useful chemistry sets, because kids can learn things from it. Its copyright wasn’t renewed when it should have been so it has fallen into the public domain. The torrent link in that entry appears to be wonky so here’s a non-Torrent local mirror.
[UPDATE (9/13/2007): Removed mirrored file. It appears to be in the public domain but not rightfully so.]