Can anybody explain to me the difference between linguistics and philology?

The question arose when I was reading an article at salon.com about Tolkien's book "The Lord of the Rings."

(http://www.salon.com/books/feature/2001/06/04/tolkien/index.html)

It is rather interesting although I don't necessarily agree with everything in it. It is worth noting that for the upcoming film of the movie, the elvish characters will be speaking in Tolkien's invented elvish [or should I capitalize that--Elvish?] language and there will be subtitles. That's quite a task. For the voice of Gandalf the actor has been trained to mimic Tolkien's own voice, from recordings of the author.

Those books (including "The Hobbit") were pretty instrumental in awakening my own interest in literature and language. Gollum was the first character I guess that I ever encoutnered who had a distinctive way of speaking that set him off from the rest of the characters.( What has it gots in its pocketses?) I'm looking forward to the film. From the previews it looks to be pretty exciting -- the Ringwraiths on horseback looked especially scary.