Merging jQuery objects

Is it possible to merge several jQuery DOM objects into one array and call jQuery methods on all of them?

F.ex:

<button>one</button>
<h3>two</h3>

<script>

var btn = $('button');
var h3 = $('h3');

$([btn,h3]).hide();

</script>

This doesn't work. I know I can use the 'button,h3' selector here but in some cases I already have several jQuery DOM elements and I need to merge them so I can call jQuery prototypes on all of them.

something like:

$.merge([btn,h3]).hide();

would work. Any ideas?

UPDATE:

Solved it. You can do it like this:

$.fn.add.call(btn,h3);

I'm going to accept the add() suggestion as for pointing me in the right direction.