Right from the Docs http://docs.jquery.com/Core/each
"This means that every time the passed-in function is executed (which
is once for every element matched) the 'this' keyword points to the
specific DOM element"
so it should be
$('.box').each(function(){
console.log( $(this).height() );
});
and that "this.height is not a function" error will go away....
