Your link to the Google FAQ's really does have a lot of information concerning public domain and Google. Anyone with questions needs to take the time to read this one. The link is in the post two or three before this one.
For the USA, Google considers anything published in 1923 or after to be copyright protected so it should be ok to download and send on this one as long as you're not doing it for commercial reasons as Alan said.
I'd copy it, but in their infinite wisdom MS apparently decided that anyone with Vista Home would never need to SEND a pdf so unless I subscribe to Adobe Acrobat for more money, all I can do is read pdf's!
Carol