jQuery .css() function with variables and multiple values

Weird little snafu. I'm using jQuery's .css() method to change the size of text (long story; no, I can't use media queries) using a variable and I need to add em to it. I'm not sure what the syntax is because there are multiple values for the CSS change.

To illustrate:

This works perfectly. It adds em to the calculated value of victore:

$('h1').css('font-size', victore + 'em');

This doesn't:

$('h1').css({
    'font-size':victore + 'em',
    'line-height':vignelli + 'em';
});

The em needs quotes... but so does the value. Wrapping it in parens didn't work