enable outline-minor-mode at startup

[Ritchie]

I'm wondering if there is a way to enable the outline-minor-mode at
startup. Without it, when I try to hide function body using command
"hide-subtree", the hided function looks as if it is empty. Outline-
minor-mode will have "..." indicating the body is hidden. When I put
(outline-minor-mode 1) in .emacs, there is no effect, I still have to
start it manually for each buffer.

Anybody know how to start outline-minor-mode automatically? Or, is
there other methods are used for hiding function bodies?

Thank you

- R